* Introduce `customize_post_value_set_{$setting_id}` and `customize_post_value_set` actions which are done when `WP_Customize_Manager::set_post_value()` is called.
* Clear the `preview_applied` flag for aggregated multidimensional settings when a post value is set. This ensures the new value is used instead of a previously-cached previewed value.
* Move `$is_preview` property from subclasses to `WP_Customize_Setting` parent class.
* Deferred preview: Ensure that when `preview()` short-circuits due to not being applicable that it will be called again later when the post value is set.
* Populate post value for updated-widget with the (unsanitized) JS-value in `WP_Customize_Widgets::call_widget_update()` so that value will be properly sanitized when accessed in `WP_Customize_Manager::post_value()`.
Includes unit tests with assertions to check the reported issues and validate the fixes.
Fixes defect introduced in [35007].
See #32103.
Fixes#34738.
Built from https://develop.svn.wordpress.org/trunk@35724
git-svn-id: http://core.svn.wordpress.org/trunk@35688 1a063a9b-81f0-0310-95a4-ce76da25c4cd
* Apply `title_save_pre`, `excerpt_save_pre`, and `content_save_pre` filters on a nav menu item's `title`, `attr_title`, and `description` properties respectively. This ensures that arbitrary markup can be supplied if the user has `unfiltered_html` cap, and for these fields to have markup stripped if not.
* Ensure a nav menu item's `post_status` is sanitized as `publish` or `draft` using the same conditions as `wp_update_nav_menu_item()`.
* Align `WP_Customize_Nav_Menu_Item_Setting::sanitize()` behavior for sanitizing `position` to be the same as `wp_update_nav_menu_item()`.
* Also apply `nav_menu_attr_title` and `nav_menu_description` filters in `WP_Customize_Nav_Menu_Item_Setting::value_as_wp_post_nav_menu_item()` to ensure that previewing markup entered into menu item description will preview the same way as when the nav menu item is saved.
* Add unit tests.
Fixes#32812.
Built from https://develop.svn.wordpress.org/trunk@35580
git-svn-id: http://core.svn.wordpress.org/trunk@35544 1a063a9b-81f0-0310-95a4-ce76da25c4cd
