Commit Graph

35116 Commits

Author SHA1 Message Date
Sergey Biryukov
0bae73682b I18N: Correct context for Next/Previous strings in get_the_posts_pagination().
Props FlorianBrinkmann.
Fixes #37952.
Built from https://develop.svn.wordpress.org/trunk@38611


git-svn-id: http://core.svn.wordpress.org/trunk@38554 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-09-15 09:20:29 +00:00
Sergey Biryukov
d4d8ae2422 Docs: Use a third-person singular verb for register_post_type_args filter added in [34242].
See #37770.
Built from https://develop.svn.wordpress.org/trunk@38610


git-svn-id: http://core.svn.wordpress.org/trunk@38553 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-09-14 21:58:29 +00:00
Sergey Biryukov
f348f9a59c Docs: Use a third-person singular verb for {$type}_template_hierarchy filter added in [38385].
See #14310.
Built from https://develop.svn.wordpress.org/trunk@38609


git-svn-id: http://core.svn.wordpress.org/trunk@38552 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-09-14 21:54:30 +00:00
Sergey Biryukov
9c6da56cc7 Docs: Use a third-person singular verb for smilies filter added in [38504].
See #35905.
Built from https://develop.svn.wordpress.org/trunk@38608


git-svn-id: http://core.svn.wordpress.org/trunk@38551 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-09-14 21:53:29 +00:00
Sergey Biryukov
7196188459 Docs: Use a third-person singular verb for wp_doing_ajax filter added in [38334].
See #25669.
Built from https://develop.svn.wordpress.org/trunk@38607


git-svn-id: http://core.svn.wordpress.org/trunk@38550 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-09-14 21:51:28 +00:00
Sergey Biryukov
b6397b4fda Docs: Use a third-person singular verb in the DocBlock summary for get_theme_file_uri(), get_parent_theme_file_uri(), get_theme_file_path(), and get_parent_theme_file_path(), introduced in [38578].
See #18302.
Built from https://develop.svn.wordpress.org/trunk@38606


git-svn-id: http://core.svn.wordpress.org/trunk@38549 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-09-14 21:48:28 +00:00
Sergey Biryukov
4d7e41653e Docs: Use a third-person singular verb for theme_file_uri, parent_theme_file_uri, theme_file_path, and parent_theme_file_path filters added in [38578].
See #18302.
Built from https://develop.svn.wordpress.org/trunk@38605


git-svn-id: http://core.svn.wordpress.org/trunk@38548 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-09-14 21:45:29 +00:00
Sergey Biryukov
4058b11ccd Docs: Add a @since entry for the post_password_required filter introduced in [38603].
Use a third-person singular verb for the filter description.

See #38056.
Built from https://develop.svn.wordpress.org/trunk@38604


git-svn-id: http://core.svn.wordpress.org/trunk@38547 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-09-14 21:37:29 +00:00
Aaron Jorbin
d31057a009 Posts: Add filter to allow overriding post_password_required return
Post Passwords are incredibly inflexible. One Password per site at a time and other limitations that can't really be changed without a backwards compatibility break.  This adds the ability for sites to change the password behavior such as doing per post passwords or allowing multiple passwords to be set in a browser. The possibilities are YUGE.

Additionally, it allows for a behavior other than returning a html form when a password is needed. This is important for non website use cases (such as in a restful API).

Fixes #38056. See #16483.
Props rmccue.


Built from https://develop.svn.wordpress.org/trunk@38603


git-svn-id: http://core.svn.wordpress.org/trunk@38546 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-09-14 21:28:30 +00:00
Helen Hou-Sandí
dd6da701b2 Customizer: Better hover/focus state for section titles and available widgets.
The 4px border pattern is found in a number of places across the admin, including plugins, notices, and Press This.

props celloexpressions, folletto, hugobaeta.
see #29158.


Built from https://develop.svn.wordpress.org/trunk@38602


git-svn-id: http://core.svn.wordpress.org/trunk@38545 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-09-14 16:15:29 +00:00
Joe Hoyle
794dd5d8cb REST API: Enable sanitize_callback to return WP_Error.
Give developers the opportunity to reject incoming data without using the validation callback. It also enables us to do sanitization and validation in one function in instances where this could be useful.

Props websupporter, rmccue.
Fixes #37560.

Built from https://develop.svn.wordpress.org/trunk@38601


git-svn-id: http://core.svn.wordpress.org/trunk@38544 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-09-14 15:50:29 +00:00
Sergey Biryukov
d7f840a211 XML-RPC: Check the minimum number of arguments in ::wp_getUsersBlogs() and ::blogger_getUsersBlogs().
Props kitchin for initial patch.
Fixes #29750.
Built from https://develop.svn.wordpress.org/trunk@38600


git-svn-id: http://core.svn.wordpress.org/trunk@38543 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-09-13 23:17:28 +00:00
Konstantin Obenland
320fe3a2b6 Make wpList easier to contribute to.
Uses more semantic variable names and adds function and inline documentation.

Props rommelxcastro for parallel work in #34917.
Fixes #36264.

Built from https://develop.svn.wordpress.org/trunk@38599


git-svn-id: http://core.svn.wordpress.org/trunk@38542 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-09-13 22:24:30 +00:00
Sergey Biryukov
84cf528449 Media: Adjust test_video_shortcode_body() after [38597].
See #38040.
Built from https://develop.svn.wordpress.org/trunk@38598


git-svn-id: http://core.svn.wordpress.org/trunk@38541 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-09-13 14:09:29 +00:00
Sergey Biryukov
893f9487d4 Media: Remove an extra space in style attribute in wp_video_shortcode() after [30082].
Props danielpietrasik.
Fixes #38040.
Built from https://develop.svn.wordpress.org/trunk@38597


git-svn-id: http://core.svn.wordpress.org/trunk@38540 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-09-13 13:45:31 +00:00
Sergey Biryukov
b434cda3a6 Docs: Synchronize docblocks for WP_Site_Query::__construct() and get_sites() after the changes in [37735], [38008], [38103], and [38336].
Props MaximeCulea.
Fixes #38039.
Built from https://develop.svn.wordpress.org/trunk@38596


git-svn-id: http://core.svn.wordpress.org/trunk@38539 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-09-13 13:20:35 +00:00
Sergey Biryukov
1cdb4b52af Docs: Correct description for domain and path arguments in WP_Network_Query::__construct().
See #32504.
Built from https://develop.svn.wordpress.org/trunk@38595


git-svn-id: http://core.svn.wordpress.org/trunk@38538 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-09-13 13:10:32 +00:00
Gary Pendergast
3e08cf2b66 Formatting: Update autop() to match wpautop().
[38592] changed the behaviour of `wpautop()` , so it's nice to change `autop()` to match.

Interestingly, this change isn't necessary for the functionality to work - #4857 didn't affect content that had been run through `autop()` at some point, as `autop()` would add a single line break before block elements, then `wpautop()` would later add a second line break, making it work correctly.

Props nacin for finding out about [38592] on Twitter, and DMing me to remind me to review `autop()`.
See #4857.


Built from https://develop.svn.wordpress.org/trunk@38594


git-svn-id: http://core.svn.wordpress.org/trunk@38537 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-09-13 06:03:31 +00:00
Gary Pendergast
e1d553e20a Docs: Fix an outdated comment.
[38592] changed the functionality of `wpautop()`, but didn't update the associated comment to match.

Fixes #4857.


Built from https://develop.svn.wordpress.org/trunk@38593


git-svn-id: http://core.svn.wordpress.org/trunk@38536 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-09-13 04:01:30 +00:00
Gary Pendergast
109ffb9390 Formatting: Add an extra line break before block elements in wpautop().
`wpautop()` considers double line breaks to be the separator between block level HTML elements. By adding two line breaks before a block element, this allows us to process the text before a block element correctly.

Fixes #4857.


Built from https://develop.svn.wordpress.org/trunk@38592


git-svn-id: http://core.svn.wordpress.org/trunk@38535 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-09-12 07:06:30 +00:00
Gary Pendergast
a18b133c01 Database: Normalise index names in dbDelta().
When comparing index definitions, normalise the index names to lower case, as they are not case sensitive within MySQL.

Fixes #34874.


Built from https://develop.svn.wordpress.org/trunk@38591


git-svn-id: http://core.svn.wordpress.org/trunk@38534 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-09-12 05:09:30 +00:00
Gary Pendergast
65fa220a08 Database: Increase the size of wp_posts.post_password to 255 characters.
Longer passwords and passphrases are much more common than when post passwords were introduced all those eons ago, so let's increase the length of the `post_password` field from 20 to 255 characters.

The password will continue to be stored in plaintext, as the ability for the post author to view the password is a commonly used feature.

Trivia: this was the last 3 digit Trac ticket to be closed.

Props skippy, nazgul, iandunn, adamsilverstein, pento.
Fixes #881.


Built from https://develop.svn.wordpress.org/trunk@38590


git-svn-id: http://core.svn.wordpress.org/trunk@38533 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-09-12 02:28:30 +00:00
Gary Pendergast
4dcb7a0fa9 Bootstrap: Use dirname() when loading class-wp-hook.php from plugin.php.
To allow `plugin.php` to be loaded before the rest of WordPress is loaded, it cannot rely on WordPress constants, such as `ABSPATH` and `WPINC`.

Instead, we can assume that `class-wp-hook.php` will be in the same directory as `plugin.php`, so `dirname( __FILE__ )` will give us the correct path to load from.

Props pento, dd32.
Fixes #37707.


Built from https://develop.svn.wordpress.org/trunk@38589


git-svn-id: http://core.svn.wordpress.org/trunk@38532 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-09-12 01:50:30 +00:00
Weston Ruter
4156988a3c Docs: Fix phpdoc and jsdoc typos introduced in [38584] and [38587], respectively.
See #33742.
See #20714.

Built from https://develop.svn.wordpress.org/trunk@38588


git-svn-id: http://core.svn.wordpress.org/trunk@38531 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-09-11 18:46:30 +00:00
Weston Ruter
edf170c943 Customize: Implement previewing of form submissions which use the GET method.
This finally allows the search results template to navigated to in the customizer preview.

Fixes #20714.

Built from https://develop.svn.wordpress.org/trunk@38587


git-svn-id: http://core.svn.wordpress.org/trunk@38530 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-09-11 05:05:30 +00:00
Boone Gorges
132f3d0d19 Query: Eliminate unnecessary wp_list_filter() call in get_queried_object().
The refactor in [30711] swapped out the old `queries` property for the
new `queried_terms`, but should also have gotten rid of the now-
superfluous `wp_list_filter()` call.

Fixes #37962.
Built from https://develop.svn.wordpress.org/trunk@38586


git-svn-id: http://core.svn.wordpress.org/trunk@38529 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-09-09 19:49:29 +00:00
Boone Gorges
163d59f8e1 Query: Avoid PHP notice in get_queried_object() when query contains NOT EXISTS tax query.
Props johnjamesjacoby.
See #37962.
Built from https://develop.svn.wordpress.org/trunk@38585


git-svn-id: http://core.svn.wordpress.org/trunk@38528 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-09-09 19:37:38 +00:00
Weston Ruter
84f9592f88 Menus: Prevent non-published posts/pages from being returned in search results for adding as nav menu items.
Re-use the same query vars in searching as when listing posts. Aligns with behavior of nav menus in customizer.

Fixes #33742.
Props welcher, westonruter.

Built from https://develop.svn.wordpress.org/trunk@38584


git-svn-id: http://core.svn.wordpress.org/trunk@38527 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-09-09 04:59:31 +00:00
John Blackbourn
e482549183 Themes: Add the non-encoded form of the queried item slug to the template hierarchy when the slug contains non-ASCII characters.
This affects category, tag, and custom taxonomy archives, and single posts, pages, and custom post types.

Fixes #37655

Built from https://develop.svn.wordpress.org/trunk@38583


git-svn-id: http://core.svn.wordpress.org/trunk@38526 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-09-09 00:48:28 +00:00
Gary Pendergast
f54dafc2b7 Tests: Use add_filter() when it's available.
The `tests_add_filter()` helper function directly manipulates the `$wp_filter` global, instead of using `add_filter()`. We can use `add_filter()` when it's available, and fall back to manipulating `$wp_filter` when it isn't, relying on the `$wp_filter` bootstrap code at the top of `plugin.php` to handle conversion.

Props boonebgorges, dd32 and pento: WordPress Thought Leadership Triumvirate.
Fixes #17817.


Built from https://develop.svn.wordpress.org/trunk@38582


git-svn-id: http://core.svn.wordpress.org/trunk@38525 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-09-09 00:34:31 +00:00
Gary Pendergast
2dee7cdffc Database: Fall back to utf8 when utf8mb4 isn't supported.
Sometimes, `DB_CHARSET` will be set to `utf8mb4`, even if the current setup doesn't support `utf8mb4`. After [38442], this can cause significant character set failures, causing the connection to fall back to `latin1`.

Instead of doing this, we now check that the connection supports `utf8mb4` before trying to use it, and fall back to `utf8` when we need to.

Fixes #37982 for trunk.

Built from https://develop.svn.wordpress.org/trunk@38580


git-svn-id: http://core.svn.wordpress.org/trunk@38523 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-09-08 23:49:30 +00:00
John Blackbourn
e6e6cbf21f Taxonomy: Revert accidental changes introduced in [38578].
See #18302

Built from https://develop.svn.wordpress.org/trunk@38579


git-svn-id: http://core.svn.wordpress.org/trunk@38522 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-09-08 22:58:28 +00:00
John Blackbourn
c0bb9c2562 Themes: Improve child theme file inheritance by introducing functions for locating and fetching the URL or path to files within child and parent themes.
The most useful function this introduces is `get_theme_file_uri()`, which returns the URL to the specified file in the child theme if it exists, and falls back to the URL to the specified file in the parent theme. This allows parent themes to reference files (including enqueuing CSS and JavaScript files) that can be overridden by the child theme simply by existing.

This change also introduces `get_theme_file_path()`, which is the file path equivalent of `get_theme_file_uri()`.

Finally, `get_parent_theme_file_uri()` and `get_parent_theme_file_path()` are also introduced, which allow a theme to specifically reference a file URL or file path in the parent theme. These can be used as replacements for `get_template_directory_uri()` and `get_template_directory()` respectively, for consistency.

Props johnbillion, georgestephanis, gma992.
Fixes #18302

Built from https://develop.svn.wordpress.org/trunk@38578


git-svn-id: http://core.svn.wordpress.org/trunk@38521 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-09-08 22:54:32 +00:00
Weston Ruter
c1a0ed8540 Customize: Prevent widget previewing logic from building invalid jQuery selectors when sidebars are registered without a class name in before_widget.
Fixes #37993.

Built from https://develop.svn.wordpress.org/trunk@38577


git-svn-id: http://core.svn.wordpress.org/trunk@38520 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-09-08 15:45:31 +00:00
John Blackbourn
3afaf2147c Formatting: Don't send an HTTP status code in wp_send_json() by default. This avoids clobbering an HTTP status code that may have been set prior to calling this function.
Props westonruter
See #35666

Built from https://develop.svn.wordpress.org/trunk@38576


git-svn-id: http://core.svn.wordpress.org/trunk@38519 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-09-08 13:45:34 +00:00
Peter Wilson
06c51c0042 Menus: Fix notices thrown by classes extending Walker_Nav_Menu.
Methods in `Walker_Nav_Menu` can be called with multiple, incompatible `$args` objects so an `insset()` check is required to avoid throwing notices.

Introduced in [38523].

Fixes #35206.

Built from https://develop.svn.wordpress.org/trunk@38575


git-svn-id: http://core.svn.wordpress.org/trunk@38518 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-09-08 07:06:30 +00:00
Peter Wilson
6cdab630cd Menus: Improve documentation of new $item_spacing argument.
Adds `@since` tags for and improves description of the new `$item_spacing` argument added to `wp_nav_menu()`, `wp_list_pages()`, and `wp_page_menu()` in [38523].

Props johnbillion for copy.
See #35206.

Built from https://develop.svn.wordpress.org/trunk@38574


git-svn-id: http://core.svn.wordpress.org/trunk@38517 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-09-08 05:32:03 +00:00
Drew Jaynes
f5db425059 Docs: Fix minor formatting for inline docs in WP_Hook following its introduction in [38571].
See #17817.

Built from https://develop.svn.wordpress.org/trunk@38573


git-svn-id: http://core.svn.wordpress.org/trunk@38516 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-09-08 04:17:30 +00:00
Aaron Jorbin
7e811d7120 Permalinks: Ensure Pending Review Posts permalink posts link to the draft
[34670] made the displayed permalink clickable. For posts that were pending review, the permalink wasn't being properly generated so the link wouldn't go to the preview.

Props knutsp, enshrined.
Fixes #37423.


Built from https://develop.svn.wordpress.org/trunk@38572


git-svn-id: http://core.svn.wordpress.org/trunk@38515 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-09-08 04:05:31 +00:00
Gary Pendergast
5a632be944 Hooks: Add the new class WP_Hook, and modify hook handling to make use of it.
Filters and actions have been the basis of WordPress' plugin functionality since time immemorial, they've always been a reliable method for acting upon the current state of WordPress, and will continue to be so.

Over the years, however, edge cases have cropped up. Particularly when it comes to recursively executing hooks, or a hook adding and removing itself, the existing implementation struggled to keep up with more complex use cases.

And so, we introduce `WP_Hook`. By changing `$wp_filter` from an array of arrays, to an array of objects, we reduce the complexity of the hook handling code, as the processing code (see `::apply_filters()`) only needs to be aware of itself, rather than the state of all hooks. At the same time, we're able te handle more complex use cases, as the object can more easily keep track of its own state than an array ever could.

Props jbrinley for the original architecture and design of this patch.
Props SergeyBiryukov, cheeserolls, Denis-de-Bernardy, leewillis77, wonderboymusic, nacin, jorbin, DrewAPicture, ocean90, dougwollison, khag7, pento, noplanman and aaroncampbell for their testing, suggestions, contributions, patch maintenance, cajoling and patience as we got through this.
Fixes #17817.


Built from https://develop.svn.wordpress.org/trunk@38571


git-svn-id: http://core.svn.wordpress.org/trunk@38514 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-09-08 03:55:31 +00:00
John Blackbourn
8bec516c18 Menus: Correct the docblocks for Walker_Nav_Menu, wp_nav_menu(), and walk_nav_menu_tree().
This corrects the parameter type for the `$args` and `$item` parameters passed throughout these functions, class methods, and hooks.

See #24587
See #35206
See #37770

Built from https://develop.svn.wordpress.org/trunk@38559


git-svn-id: http://core.svn.wordpress.org/trunk@38502 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-09-07 16:15:30 +00:00
Jeremy Felt
c9e60dab17 Media: Sanitize upload filename.
Built from https://develop.svn.wordpress.org/trunk@38538


git-svn-id: http://core.svn.wordpress.org/trunk@38481 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-09-07 13:55:36 +00:00
Andrea Fercia
4a06a09310 Widgets: Make the Delete/Remove links red.
For consistency and accessibility, all the UI controls that perform destructive
actions should be red.

Props monikarao, lukecavanagh, patilswapnilv, ibachal.
See #35622.
Fixes #37016.

Built from https://develop.svn.wordpress.org/trunk@38536


git-svn-id: http://core.svn.wordpress.org/trunk@38479 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-09-07 09:52:30 +00:00
Dion Hulse
1dbef33d80 Bump Akismet External.
See #37961


git-svn-id: http://core.svn.wordpress.org/trunk@38477 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-09-07 02:06:44 +00:00
Pascal Birchler
18a8cf475b Revert [38401] after [38480].
See #36335.
Built from https://develop.svn.wordpress.org/trunk@38535


git-svn-id: http://core.svn.wordpress.org/trunk@38476 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-09-06 18:13:35 +00:00
Pascal Birchler
54720a14d8 Upgrade/Install: Sanitize file name in File_Upload_Upgrader.
Built from https://develop.svn.wordpress.org/trunk@38524


git-svn-id: http://core.svn.wordpress.org/trunk@38465 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-09-06 17:26:31 +00:00
Peter Wilson
4131900722 Menus: Add white space option to wp_nav_menu() and wp_list_pages().
Adds an `item_spacing` option to the arguments array for the functions `wp_nav_menu()`, `wp_list_pages()`, and `wp_page_menu()`. `item_spacing` is a boolean accepting either `preserve` or `discard`.

Previously, certain CSS choices could result in a site's layout changing if `wp_nav_menu()` fell back to the default `wp_list_pages()` due to differences in the whitespace within the HTML. The new argument ensures a function outputs consistant HTML while maintaining backward compatibility.

Fixes #35206.

Built from https://develop.svn.wordpress.org/trunk@38523


git-svn-id: http://core.svn.wordpress.org/trunk@38464 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-09-06 09:06:31 +00:00
John Blackbourn
cfe941cd6f Role/Capability: Correct the multisite cap tests after [38521].
See #35614
See #32394

Built from https://develop.svn.wordpress.org/trunk@38522


git-svn-id: http://core.svn.wordpress.org/trunk@38463 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-09-05 12:09:30 +00:00
John Blackbourn
9cf899d6f9 Role/Capability: Split meta and primitive capabilities in the helper functions in the roles and capability tests so primitive capability tests can be made more accurate.
See #35614
See #32394

Built from https://develop.svn.wordpress.org/trunk@38521


git-svn-id: http://core.svn.wordpress.org/trunk@38462 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-09-05 11:00:32 +00:00
Andrea Fercia
3c1d571cd7 Accessibility: Improve the Customizer and Theme Installer initial focus.
The Customizer and Theme Installer open in full overlays that need to receive 
focus. Also, keyboard navigation should be constrained within the overlays. Using
CSS `visibility` to hide all the content except the overlays, makes them the only
available and focusable content and allows browsers to handle focus natively.

See #29158.
Fixes #33228, #27705.

Built from https://develop.svn.wordpress.org/trunk@38520


git-svn-id: http://core.svn.wordpress.org/trunk@38461 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-09-04 21:51:31 +00:00