runDialog: Reload resource on 'rt'

Moving the default theme to a resource broke the 'rt' command;
reload the resource before the theme to fix it.

https://bugzilla.gnome.org/show_bug.cgi?id=738942

js/ui/runDialog.js

@@ -61,6 +61,7 @@ const RunDialog = new Lang.Class({
 
                                    // rt is short for "reload theme"
                                    'rt': Lang.bind(this, function() {
+                                       Main.reloadThemeResource();
                                        Main.loadTheme();
                                    })
                                  };