Resolve promise

Author: janodvarko

lib/wsm-panel.js

@@ -143,6 +143,8 @@ const WsmPanel = Class(
       // xxxHonza: unregister actor on shutdown/disable/uninstall
       // but not on toolbox close.
       this.registrar = registrar;
+
+      deferred.resolve(this.front);
     }, response => {
       console.log("WsmPanel.attach; ERROR " + response, response);
     });