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6657 Commits

Author SHA1 Message Date
John Blackbourn
9b7814a4a1 Security: Loosen the admin referrer policy header value to allow the referring host to be sent from the admin area in all cases. 
This allows referrer-restricted content from third parties (such as images and fonts) to continue working in the admin area.

Props aranwer104, qcmiao

Fixes #43285

Merges [42830] to the 4.9 branch.

Built from https://develop.svn.wordpress.org/branches/4.9@42831


git-svn-id: http://core.svn.wordpress.org/branches/4.9@42661 1a063a9b-81f0-0310-95a4-ce76da25c4cd
 2018-03-12 10:59:39 +00:00
Mike Schroder
7546fcc64a Media: Correctly allow changing PDF thumbnail crop value. 
Corrects logic that kept plugins from setting crop value of intermediate image sizes for rendered PDFs.
Adds test.

Props leemon, SergeyBiryukov, chetan200891, birgire.
Merges [42792] to the 4.9 branch.
Fixes #43226.

Built from https://develop.svn.wordpress.org/branches/4.9@42813


git-svn-id: http://core.svn.wordpress.org/branches/4.9@42643 1a063a9b-81f0-0310-95a4-ce76da25c4cd
 2018-03-09 03:21:40 +00:00
Sergey Biryukov
a91c3fbdc0 General: Replace Cheatin’ uh? with friendlier error messages. 
While intended as a playful error message, `Cheatin’ uh?` can be interpreted as insulting or accusatory in an already stressful situation. This replaces Cheatin’ with more meaningful error messages, depending on the error that occurs.

Props ElectricFeet, EricMeyer, karmatosed, dd32, BandonRandon, melchoyce, kristastevens for language; dmsnell for original patch; peterwilsoncc.
Merged [42648] and [42719] to the 4.9 branch.
Fixes #38332.
Built from https://develop.svn.wordpress.org/branches/4.9@42811


git-svn-id: http://core.svn.wordpress.org/branches/4.9@42641 1a063a9b-81f0-0310-95a4-ce76da25c4cd
 2018-03-09 00:15:42 +00:00
Sergey Biryukov
e0f0ee5de6 Users: Display partial names in the user listing tables. 
This allows showing a name when only the first or last name is provided.

Props shital-patel, antipole.
Merges [42256] and [42257] to the 4.9 branch.
Fixes #42713.
Built from https://develop.svn.wordpress.org/branches/4.9@42805


git-svn-id: http://core.svn.wordpress.org/branches/4.9@42635 1a063a9b-81f0-0310-95a4-ce76da25c4cd
 2018-03-08 19:48:39 +00:00
Sergey Biryukov
7f190a310c Customize: Correct closing tags in customize_themes_print_templates(). 
Props johnpgreen, nandorsky.
Merges [42711] to the 4.9 branch.
Fixes #43307.
Built from https://develop.svn.wordpress.org/branches/4.9@42803


git-svn-id: http://core.svn.wordpress.org/branches/4.9@42633 1a063a9b-81f0-0310-95a4-ce76da25c4cd
 2018-03-08 19:42:39 +00:00
Sergey Biryukov
d9bf3e5e60 Plugins: Update review filter links in Details modal. 
Props darko-a7, afercia.
Merges [42459] to the 4.9 branch.
Fixes #43016. See #meta3379.
Built from https://develop.svn.wordpress.org/branches/4.9@42524


git-svn-id: http://core.svn.wordpress.org/branches/4.9@42353 1a063a9b-81f0-0310-95a4-ce76da25c4cd
 2018-01-17 07:02:41 +00:00
Dion Hulse
e77f8257ea External Libraries: Remove unnecessary / obsoleted MediaElement.js files. 
Props joemcgill.
Merges [42462] to the 4.9 branch.
Fixes #42720 for 4.9.

Built from https://develop.svn.wordpress.org/branches/4.9@42465


git-svn-id: http://core.svn.wordpress.org/branches/4.9@42294 1a063a9b-81f0-0310-95a4-ce76da25c4cd
 2018-01-16 06:41:51 +00:00
Sergey Biryukov
9026b41b3b Media: Bring consistency to getimagesize() error suppression. 
Props chasewg, joemcgill, jeremyfelt.
Merges [42449] to the 4.9 branch.
Fixes #42480.
Built from https://develop.svn.wordpress.org/branches/4.9@42450


git-svn-id: http://core.svn.wordpress.org/branches/4.9@42280 1a063a9b-81f0-0310-95a4-ce76da25c4cd
 2018-01-15 20:02:39 +00:00
Dion Hulse
5973b3a5e1 Upgrade: When deleting old files, if deletion fails attempt to empty the file instead. 
Props joemcgill, dd32.
Merges [42433] to the 4.9 branch.
Fixes #42963 for 4.9.

Built from https://develop.svn.wordpress.org/branches/4.9@42434


git-svn-id: http://core.svn.wordpress.org/branches/4.9@42264 1a063a9b-81f0-0310-95a4-ce76da25c4cd
 2018-01-10 06:11:39 +00:00
Dion Hulse
9fe3e9edf0 Theme Editor: Validate files are editable based on their relative filenames, rather than full file path. 
This fixes theme editing on Windows platforms where `validate_file()` will return `2` on a full file path.

Merges [42244] to the 4.9 branch.
Fixes #42609.

Built from https://develop.svn.wordpress.org/branches/4.9@42245


git-svn-id: http://core.svn.wordpress.org/branches/4.9@42074 1a063a9b-81f0-0310-95a4-ce76da25c4cd
 2017-11-27 03:29:25 +00:00
Dion Hulse
e1095eeb9f Theme/Plugin Editor: Remove the caching added in [41806] as it causes more problems than it fixes. 
While caching here seemed like a good idea in theory, in practice the cache would be often stale causing development issues.
We exclude common folders (such as `node_modules`) from the scanning to avoid directories which are not useful to the end-user, so as long as those exclusion lists are held up this shouldn't cause too much of a degredation in the future.
We may consider adding caching here again in the future if it's determined that it is really needed.

Props precies, ibenic, mariovalney, schlessera, and all the others who commented on the ticket(s).
This partually reverts [41806].
Merges [42242] to the 4.9 branch.
See #6531.
Fixes #42573 for 4.9.

Built from https://develop.svn.wordpress.org/branches/4.9@42243


git-svn-id: http://core.svn.wordpress.org/branches/4.9@42072 1a063a9b-81f0-0310-95a4-ce76da25c4cd
 2017-11-27 03:00:38 +00:00
John Blackbourn
97ba6be232 Docs: Correct the @since property for the page_attributes_misc_attributes action. 
Props jeremyescott, jfarthing84

Fixes #42607

Merges [42203] to the 4.9 branch.

Built from https://develop.svn.wordpress.org/branches/4.9@42219


git-svn-id: http://core.svn.wordpress.org/branches/4.9@42048 1a063a9b-81f0-0310-95a4-ce76da25c4cd
 2017-11-23 18:03:43 +00:00
Dion Hulse
cee7720939 Upgrade: Fix updating plugins which include a numeric file/folder names. 
The fix in [41821] caused numeric folder names to be reindexed to 0..n when in the root directory (for example, `my-plugin/24/`).

Props edo888.
See #41524.
Merges [42214] to the 4.9 branch.
Fixes #42628 for 4.9.

Built from https://develop.svn.wordpress.org/branches/4.9@42215


git-svn-id: http://core.svn.wordpress.org/branches/4.9@42044 1a063a9b-81f0-0310-95a4-ce76da25c4cd
 2017-11-21 04:16:41 +00:00
Dion Hulse
b09cebf575 Rewrite Rules: Correct the logic in extract_from_markers() after [41928]. 
Props stodorovic, SergeyBiryukov.
Merges [42199] to the 4.9 branch.
Fixes #42579. See #39920.

Built from https://develop.svn.wordpress.org/branches/4.9@42213


git-svn-id: http://core.svn.wordpress.org/branches/4.9@42042 1a063a9b-81f0-0310-95a4-ce76da25c4cd
 2017-11-21 03:47:38 +00:00
Dion Hulse
66a3d52431 Multisite: Fix broken update blog_versions query after [41661]. 
Props Mista-Flo, lenasterg, flixos90.
Merges [42210] to the 4.9 branch.
Fixes #42641.

Built from https://develop.svn.wordpress.org/branches/4.9@42212


git-svn-id: http://core.svn.wordpress.org/branches/4.9@42041 1a063a9b-81f0-0310-95a4-ce76da25c4cd
 2017-11-21 03:43:40 +00:00
Weston Ruter
15b14c30c1 Customize: Prevent PHP notice on theme-switch dashboard welcome link (and link to themes admin screen) when user cannot customize. 
Props skostadinov, ocean90.
Amends [41699].
See #42050.
Fixes #42525 for 4.9.

Built from https://develop.svn.wordpress.org/branches/4.9@42170


git-svn-id: http://core.svn.wordpress.org/branches/4.9@42000 1a063a9b-81f0-0310-95a4-ce76da25c4cd
 2017-11-13 22:45:47 +00:00
Weston Ruter
a647fbead2 Settings: Replace count() call with empty() in get_settings_errors() to prevent PHP 7.2 warnings when $wp_settings_errors is null. 
Props pross, dd32, westonruter.
See #40109.
Fixes #42498 for 4.9.

Built from https://develop.svn.wordpress.org/branches/4.9@42147


git-svn-id: http://core.svn.wordpress.org/branches/4.9@41978 1a063a9b-81f0-0310-95a4-ce76da25c4cd
 2017-11-10 22:32:47 +00:00
Weston Ruter
e6a91f7ccf Settings: Fix date/time format previewing. 
Props afercia.
Amends [41857].
Fixes #41603 for 4.9.

Built from https://develop.svn.wordpress.org/branches/4.9@42135


git-svn-id: http://core.svn.wordpress.org/branches/4.9@41966 1a063a9b-81f0-0310-95a4-ce76da25c4cd
 2017-11-09 03:57:36 +00:00
Konstantin Obenland
65c1468ff5 File Editors: Account for network admin use 
Fixes a bug where files couldn't be accessed in multisite installs.

Props flixos90, westonruter.
Fixes #42420.


Built from https://develop.svn.wordpress.org/trunk@42115


git-svn-id: http://core.svn.wordpress.org/trunk@41944 1a063a9b-81f0-0310-95a4-ce76da25c4cd
 2017-11-03 18:51:49 +00:00
Weston Ruter
83c29a4d08 Theme Editor: Ensure files listed recursively can be both viewed and edited. 
Prevent edits to 2-level deep theme files from returning a `disallowed_theme_file` error when attempting to save an edit. Aligns logic for gathering `$allowed_files` in `theme-editor.php` for listing files with the validation logic in `wp_edit_theme_plugin_file()`.

Amends [41806].
See #6531.
Fixes #42425.

Built from https://develop.svn.wordpress.org/trunk@42112


git-svn-id: http://core.svn.wordpress.org/trunk@41941 1a063a9b-81f0-0310-95a4-ce76da25c4cd
 2017-11-02 23:05:48 +00:00
iandunn
2762709d2a Dashboard: Strip ports from IPs to avoid PHP warnings. 
Fixes #41083.
Props pento, iandunn, EatonZ, birgire, dd32.

Built from https://develop.svn.wordpress.org/trunk@42016


git-svn-id: http://core.svn.wordpress.org/trunk@41850 1a063a9b-81f0-0310-95a4-ce76da25c4cd
 2017-10-25 00:07:46 +00:00
Weston Ruter
12c626c82e Update $_old_files to add the deleted MediaElement.js files when it was upgraded from 2.22.0 to 4.2.3. 
Amends [41198].
See #39686.
Fixes #42097.

Built from https://develop.svn.wordpress.org/trunk@42015


git-svn-id: http://core.svn.wordpress.org/trunk@41849 1a063a9b-81f0-0310-95a4-ce76da25c4cd
 2017-10-25 00:02:50 +00:00
John Blackbourn
2f3e91028a Filesystem API: Add more specificity to the rules for valid files in validate_file(). 
This now treats files containing `./` as valid, and also treats files containing a trailing `../` as valid due to widespread use of this pattern in theme and plugin zip files.

Adds tests.

Props Ipstenu, borgesbruno, DavidAnderson, philipjohn, birgire
Fixes #42016, #36170

Built from https://develop.svn.wordpress.org/trunk@42011


git-svn-id: http://core.svn.wordpress.org/trunk@41845 1a063a9b-81f0-0310-95a4-ce76da25c4cd
 2017-10-24 23:15:49 +00:00
John Blackbourn
16cfe96580 Filesystem API: Don't immediately return an error for invalid file names contained within a Zip while it's being extracted. 
This allows the extraction of the rest of the valid files within the archive to continue.

See #42016

Built from https://develop.svn.wordpress.org/trunk@42010


git-svn-id: http://core.svn.wordpress.org/trunk@41844 1a063a9b-81f0-0310-95a4-ce76da25c4cd
 2017-10-24 23:11:50 +00:00
Weston Ruter
48e726bbef Embeds: Improve consistency of update and refresh logic for oEmbed caching between oembed_cache and post meta. 
* Allow updating oEmbed cache during `parse-embed` requests for non-post editors (such as widgets).
* Update any existing `oembed_cache` post when `usecache` and TTL has passed.
* Do not overwrite a previously valid cache with `{{unknown}}`.

Props dlh.
See #34115.
Fixes #42310.

Built from https://develop.svn.wordpress.org/trunk@42009


git-svn-id: http://core.svn.wordpress.org/trunk@41843 1a063a9b-81f0-0310-95a4-ce76da25c4cd
 2017-10-24 23:10:48 +00:00
John Blackbourn
4812370aab Docs: Improve the docs for validate_file() and validate_file_to_edit(). 
See #42016, #36170, #41017

Built from https://develop.svn.wordpress.org/trunk@42007


git-svn-id: http://core.svn.wordpress.org/trunk@41841 1a063a9b-81f0-0310-95a4-ce76da25c4cd
 2017-10-24 22:50:49 +00:00
Sergey Biryukov
29d5ee851c I18N: Use a consistent pattern for translator comments for placeholders in some more Customizer strings. 
See #41974.
Built from https://develop.svn.wordpress.org/trunk@42006


git-svn-id: http://core.svn.wordpress.org/trunk@41840 1a063a9b-81f0-0310-95a4-ce76da25c4cd
 2017-10-24 22:47:46 +00:00
Sergey Biryukov
f156f90ff5 I18N: Add a context for remaining "Schedule" strings. 
Props Mirucon.
Fixes #42165.
Built from https://develop.svn.wordpress.org/trunk@42005


git-svn-id: http://core.svn.wordpress.org/trunk@41839 1a063a9b-81f0-0310-95a4-ce76da25c4cd
 2017-10-24 22:35:47 +00:00
Sergey Biryukov
654386a5b7 Taxonomy: After [40984], add the most_used label for non-hierarchical taxonomies too, and use it on the Menus screen. 
Props johnbillion.
Fixes #41150.
Built from https://develop.svn.wordpress.org/trunk@41987


git-svn-id: http://core.svn.wordpress.org/trunk@41821 1a063a9b-81f0-0310-95a4-ce76da25c4cd
 2017-10-24 11:23:24 +00:00
Weston Ruter
9093718b15 Editor: Specify maxwidth in parse-embed requests based on width of editor iframe so that TinyMCE view embeds fit, particularly in Text widgets. 
See #40854, #34115.

Built from https://develop.svn.wordpress.org/trunk@41985


git-svn-id: http://core.svn.wordpress.org/trunk@41819 1a063a9b-81f0-0310-95a4-ce76da25c4cd
 2017-10-24 04:07:50 +00:00
Peter Wilson
339d838475 Comments: Check if wp_new_comment() returns an error. 
Adds checks throughout to allow for `wp_new_comment()` returning a `WP_Error` instance.

Updates the docs for the `pre_comment_approved` filter to include that it can be passed an error.

Props enrico.sorcinelli, ryotsun.
Fixes #39730.


Built from https://develop.svn.wordpress.org/trunk@41980


git-svn-id: http://core.svn.wordpress.org/trunk@41814 1a063a9b-81f0-0310-95a4-ce76da25c4cd
 2017-10-23 22:12:51 +00:00
Aaron Jorbin
b8fc8cb59c Dashboard: Remove "Try Gutenberg" callout. 
Reverting this for 4.9. It will be added back in a future version of WordPress. This doesn't mean that you shouldn't be trying Gutenberg, just that it isn't ready for a call out to a larger audience. But if you are the type to read commit messages, https://github.com/WordPress/gutenberg could use your pull requests and comments on issues.

Reverts [41931] [41900] [41896] [41895]
See #41316


Built from https://develop.svn.wordpress.org/trunk@41978


git-svn-id: http://core.svn.wordpress.org/trunk@41812 1a063a9b-81f0-0310-95a4-ce76da25c4cd
 2017-10-23 20:48:47 +00:00
Gary Pendergast
0847fab645 Media: Don't backdate media uploaded to pages. 
When media is uploaded to a post, the upload directory is set according to the date of the post, so that the media URLs in the post match when the post was published.

A page is a slightly different beast, pages often live for years, and are regularly updated to stay relevant. This change causes media uploaded to pages to use the upload date to determine the upload directory.

Fixes #10752.


Built from https://develop.svn.wordpress.org/trunk@41964


git-svn-id: http://core.svn.wordpress.org/trunk@41798 1a063a9b-81f0-0310-95a4-ce76da25c4cd
 2017-10-21 13:27:48 +00:00
Dion Hulse
26f9c6b909 Transients: Clear expired transients from the database in a daily cron task. 
Fixes #41699

Built from https://develop.svn.wordpress.org/trunk@41963


git-svn-id: http://core.svn.wordpress.org/trunk@41797 1a063a9b-81f0-0310-95a4-ce76da25c4cd
 2017-10-21 13:22:49 +00:00
Sergey Biryukov
1accb992f8 Menus: Pass $recent_args parameter to nav_menu_items_{$post_type_name}_recent filter. 
Props welcher, eclev91.
Fixes #39849.
Built from https://develop.svn.wordpress.org/trunk@41941


git-svn-id: http://core.svn.wordpress.org/trunk@41775 1a063a9b-81f0-0310-95a4-ce76da25c4cd
 2017-10-19 13:05:55 +00:00
Sergey Biryukov
15c8976cc4 Dashboard: Add missing URL to "Help with testing" link in Gutenberg callout. 
See #41316.
Built from https://develop.svn.wordpress.org/trunk@41931


git-svn-id: http://core.svn.wordpress.org/trunk@41765 1a063a9b-81f0-0310-95a4-ce76da25c4cd
 2017-10-18 22:41:46 +00:00
Sergey Biryukov
0f06f90341 Rewrite Rules: Remove redundant if condition in extract_from_markers(). 
Props Dency, yahil, appchecker.
Fixes #39920.
Built from https://develop.svn.wordpress.org/trunk@41928


git-svn-id: http://core.svn.wordpress.org/trunk@41762 1a063a9b-81f0-0310-95a4-ce76da25c4cd
 2017-10-18 21:28:46 +00:00
Sergey Biryukov
d2499c4212 Network Admin: After [41923], move the second <p> tag to a new line for better readability. 
See #41652.
Built from https://develop.svn.wordpress.org/trunk@41924


git-svn-id: http://core.svn.wordpress.org/trunk@41758 1a063a9b-81f0-0310-95a4-ce76da25c4cd
 2017-10-18 20:51:48 +00:00
Sergey Biryukov
a749494900 I18N: Remove hardcoded constant from a translatable string in network_step1(). 
Props ramiy.
Fixes #41652.
Built from https://develop.svn.wordpress.org/trunk@41923


git-svn-id: http://core.svn.wordpress.org/trunk@41757 1a063a9b-81f0-0310-95a4-ce76da25c4cd
 2017-10-18 20:02:50 +00:00
Sergey Biryukov
106beec6a7 I18N: Combine two "Warning" strings in network_step1() and network_step2(). 
Props ramiy.
Fixes #38570.
Built from https://develop.svn.wordpress.org/trunk@41921


git-svn-id: http://core.svn.wordpress.org/trunk@41755 1a063a9b-81f0-0310-95a4-ce76da25c4cd
 2017-10-18 19:50:47 +00:00
Sergey Biryukov
a28bd1d36c Plugins: Revert unintended change from [41915]. 
See #37430.
Built from https://develop.svn.wordpress.org/trunk@41916


git-svn-id: http://core.svn.wordpress.org/trunk@41750 1a063a9b-81f0-0310-95a4-ce76da25c4cd
 2017-10-18 18:01:49 +00:00
Sergey Biryukov
936bf3661f Plugins: After [41608], make the markup in WP_Plugin_Install_List_Table::no_items() a bit more readable. 
See #37430.
Built from https://develop.svn.wordpress.org/trunk@41915


git-svn-id: http://core.svn.wordpress.org/trunk@41749 1a063a9b-81f0-0310-95a4-ce76da25c4cd
 2017-10-18 17:58:48 +00:00
Sergey Biryukov
4dd637acde Docs: Add @since entry for WP_Automatic_Updater::after_core_update(), introduced in [25841]. 
See #41017, #29086.
Built from https://develop.svn.wordpress.org/trunk@41914


git-svn-id: http://core.svn.wordpress.org/trunk@41748 1a063a9b-81f0-0310-95a4-ce76da25c4cd
 2017-10-18 17:48:49 +00:00
Weston Ruter
ae538512c3 Widgets: Fix previewing embeds in Text widget by allowing parse-embed admin ajax requests with an empty post_ID just as WP_oEmbed_Controller::get_proxy_item_permissions_check() allows. 
As of #34115 if there is no post context the oEmbed will be cached in an `oembed_cache` custom post type, so having a post as context is no longer a requirement for caching.

Props biskobe, westonruter.
See #34115, #40450.
Fixes #40854.

Built from https://develop.svn.wordpress.org/trunk@41913


git-svn-id: http://core.svn.wordpress.org/trunk@41747 1a063a9b-81f0-0310-95a4-ce76da25c4cd
 2017-10-18 17:40:49 +00:00
Sergey Biryukov
3951984680 I18N: Remove <b> tag from a translatable string in post_submit_meta_box(). 
Props ramiy.
Fixes #41681.
Built from https://develop.svn.wordpress.org/trunk@41910


git-svn-id: http://core.svn.wordpress.org/trunk@41744 1a063a9b-81f0-0310-95a4-ce76da25c4cd
 2017-10-18 17:31:48 +00:00
Sergey Biryukov
6b2a4c4574 I18N: Remove <strong> tag from a translatable string in Theme_Upgrader::install_strings(). 
Props ramiy.
Fixes #41695.
Built from https://develop.svn.wordpress.org/trunk@41909


git-svn-id: http://core.svn.wordpress.org/trunk@41743 1a063a9b-81f0-0310-95a4-ce76da25c4cd
 2017-10-18 17:20:48 +00:00
Sergey Biryukov
2b9e8abd8f I18N: Remove <code> tags from translatable strings in Core_Upgrader, Language_Pack_Upgrader, Plugin_Upgrader, Theme_Upgrader. 
Props ramiy.
Fixes #41705.
Built from https://develop.svn.wordpress.org/trunk@41908


git-svn-id: http://core.svn.wordpress.org/trunk@41742 1a063a9b-81f0-0310-95a4-ce76da25c4cd
 2017-10-18 17:15:47 +00:00
Sergey Biryukov
f9ff030127 I18N: Replace hardcoded file name in a translatable string in convert_to_screen() with a placeholder. 
Props ramiy.
Fixes #41668.
Built from https://develop.svn.wordpress.org/trunk@41906


git-svn-id: http://core.svn.wordpress.org/trunk@41740 1a063a9b-81f0-0310-95a4-ce76da25c4cd
 2017-10-18 15:46:52 +00:00
Gary Pendergast
3981736cd6 Dashboard: Introduce a "Try Gutenberg" callout. 
To encourage more people to try Gutenberg, this new Dashboard box allows site users to easily install and try out Gutenberg.

Props pento, melchoyce, joen, karmatosed.
Fixes #41316.


Built from https://develop.svn.wordpress.org/trunk@41895


git-svn-id: http://core.svn.wordpress.org/trunk@41729 1a063a9b-81f0-0310-95a4-ce76da25c4cd
 2017-10-18 10:04:47 +00:00
Weston Ruter
bd9d1d9178 Customize: Allow post/page stubs to be edited in WP Admin as "customization drafts" when changeset is saved as draft or scheduled. 
* Update stubs to have draft status when changeset is saved as draft, instead of preventing auto-draft garbage collection by giving them a far-future `post_date`.
* Show notice in publish metabox when editing a customization draft indicating that it will be published automatically with its changeset; a link to Customizer is included.
* Include a new "Customization Draft" display post state in the post list table.
* Disconnect stubs from their changesets when they are updated with a status other than "Draft".
* Trash customization drafts when their related changeset is trashed or deleted.
* Add a `_customize_changeset_uuid` postmeta to stubs to link them with their associated changeset.
* Include `customize_changeset_uuid` as context when requesting to insert a new auto-draft.

Props westonruter, melchoyce.
See #39896, #39752, #34923.
Fixes #42220.

Built from https://develop.svn.wordpress.org/trunk@41887


git-svn-id: http://core.svn.wordpress.org/trunk@41721 1a063a9b-81f0-0310-95a4-ce76da25c4cd
 2017-10-17 20:15:52 +00:00