Fix the broken default module rendering

defaultModule option for language settings is module name string
and not the module itself

Change-Id: Ief84cc723157df43c7ec57d6576a707df09b9e2d

resources/js/ext.uls.init.js

@@ -110,7 +110,7 @@
 			uls.$menu.find( "div#settings-block" ).append( $displaySettings );
 			var position = uls.position();
 			$displaySettings.languagesettings( {
-				defaultModule: $.fn.languagesettings.modules['display'],
+				defaultModule: 'display',
 				onClose: function () {
 					uls.show();
 				},

resources/js/ext.uls.languagesettings.js

@@ -185,7 +185,7 @@
 	$.fn.languagesettings.modules = {};
 	$.fn.languagesettings.defaults = {
 		template: windowTemplate,
-		defaultModule: false,
+		defaultModule: false, // Name of the default module
 		onClose: null, // An onClose event handler.
 		top: null, // Top position of this window
 		left: null // Left position of this window