js: Name all the timeouts and idles

With very uninventive names. Names now, good names later.

https://bugzilla.gnome.org/show_bug.cgi?id=727983

js/ui/main.js

@@ -608,5 +608,6 @@ function queueDeferredWork(workId) {
             _deferredTimeoutId = 0;
             return GLib.SOURCE_REMOVE;
         });
+        GLib.Source.set_name_by_id(_deferredTimeoutId, '[gnome-shell] _runAllDeferredWork');
     }
 }