Bug 1024789 - Fix uncaught rejections in browser_toolbox_window_reload_target.js by cancelling asyncronous update of InspectorPanel._defaultNode if page navigates. r=pbrosset
Bug 1027138 - Revert fix from Bug 984075 and fix arrow rendering by extra gtk_widget_show() call. It realizes the arrow widget and allocates it a size. r=karlt