dateMenu: Fix a runtime warning

GJS now warns about excess parameters, so wrap the queue_relayout()
into an anonymous function instead of using it directly as signal
handler.

js/ui/dateMenu.js

@@ -370,8 +370,7 @@ const IndicatorPad = new Lang.Class({
 
     _init: function(actor) {
         this._source = actor;
-        this._source.connect('notify::visible',
-                             Lang.bind(this, this.queue_relayout));
+        this._source.connect('notify::visible', () => { this.queue_relayout(); });
         this.parent();
     },