Customize: Prevent collapsing expanded panel/section/control when `Esc` is pressed on a block editor instance.

This ensures that the current panel is not collapsed when hitting `Esc` with the focus on the widget block editor.

Follow-up to [37347], [39120].

Props gwwar, dlh.
Fixes #54030.
Built from https://develop.svn.wordpress.org/trunk@51682


git-svn-id: http://core.svn.wordpress.org/trunk@51288 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/js/customize-controls.js

@@ -8461,6 +8461,13 @@
 				return;
 			}
 
+			// Abort if we're inside of a block editor instance.
+			if ( event.target.closest( '.block-editor-writing-flow' ) !== null
+				|| event.target.closest( '.block-editor-block-list__block-popover' ) !== null
+			) {
+				return;
+			}
+
 			// Check for expanded expandable controls (e.g. widgets and nav menus items), sections, and panels.
 			api.control.each( function( control ) {
 				if ( control.expanded && control.expanded() && _.isFunction( control.collapse ) ) {

wp-includes/version.php

@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.9-alpha-51679';
+$wp_version = '5.9-alpha-51682';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.