drive-menu: Adjust for renamed .desktop file name

Nautilus now uses reverse domain notation for its .desktop file,
adjust for that.

https://bugzilla.gnome.org/show_bug.cgi?id=739931

extensions/drive-menu/extension.js

@@ -150,7 +150,7 @@ const DriveMenu = new Lang.Class({
 	this.menu.addMenuItem(new PopupMenu.PopupSeparatorMenuItem());
 	this.menu.addAction(_("Open File"), function(event) {
 	    let appSystem = Shell.AppSystem.get_default();
-	    let app = appSystem.lookup_app('nautilus.desktop');
+	    let app = appSystem.lookup_app('org.gnome.Nautilus.desktop');
 	    app.activate_full(-1, event.get_time());
 	});