Code Modernization: Fix a JS error in `wpdialog`.

This changeset replaces `this.element._trigger('focus');` with `this.element.trigger('focus');` in `wpdialog` to fix a JS error introduced in [55052].

Indeed, `this` inside the `open()` function of `wpdialog` refers to the jQuery UI widget, whereas `this.element` is the jQuery object of the DOM element. Thus, native jQuery methods need to be used, as `_trigger` is only defined on the jQuery UI widget.

Follow-up to [55052].

Props TobiasBg, audrasjb, shubham1gupta.
Fixes #56830.

Built from https://develop.svn.wordpress.org/trunk@55134


git-svn-id: http://core.svn.wordpress.org/trunk@54667 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/js/wpdialog.js

@@ -17,7 +17,7 @@
 			this._super();
 
 			// WebKit leaves focus in the TinyMCE editor unless we shift focus.
-			this.element._trigger('focus');
+			this.element.trigger('focus');
 			this._trigger('refresh');
 		}
 	});

wp-includes/js/wpdialog.min.js

@@ -1,2 +1,2 @@
 /*! This file is auto-generated */
-!function(e){e.widget("wp.wpdialog",e.ui.dialog,{open:function(){this.isOpen()||!1===this._trigger("beforeOpen")||(this._super(),this.element._trigger("focus"),this._trigger("refresh"))}}),e.wp.wpdialog.prototype.options.closeOnEscape=!1}(jQuery);
+!function(e){e.widget("wp.wpdialog",e.ui.dialog,{open:function(){this.isOpen()||!1===this._trigger("beforeOpen")||(this._super(),this.element.trigger("focus"),this._trigger("refresh"))}}),e.wp.wpdialog.prototype.options.closeOnEscape=!1}(jQuery);

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.2-alpha-55133';
+$wp_version = '6.2-alpha-55134';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.