Customizer: Trigger `widget-added` event when initializing.

Widget controls are now added to the pane dynamically via JavaScript, see #28709.
Remove the event trigger from `SidebarControl.addWidget()` as it's covered by `WidgetControl.ready()`.

props westonruter.
fixes #30236.
Built from https://develop.svn.wordpress.org/trunk@30308


git-svn-id: http://core.svn.wordpress.org/trunk@30307 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/js/customize-widgets.js

@@ -434,6 +434,12 @@
 			this._setupHighlightEffects();
 			this._setupUpdateUI();
 			this._setupRemoveUI();
+
+			/*
+			 * Trigger widget-added event so that plugins can attach any event
+			 * listeners and dynamic UI elements.
+			 */
+			$( document ).trigger( 'widget-added', [ this.container.find( '.widget:first' ) ] );
 		},
 
 		/**
@@ -1806,8 +1812,6 @@
 				}
 			} );
 
-			$( document ).trigger( 'widget-added', [ $widget ] );
-
 			return widgetFormControl;
 		}
 	} );

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.1-alpha-30307';
+$wp_version = '4.1-alpha-30308';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.