keybindings.js: Allow keybindings during POPUP action mode.

This fixes super not closing the menu once it's open, a regression
from 3eca438.

Author: mtwebster

js/ui/keybindings.js

@@ -276,7 +276,8 @@ KeybindingManager.prototype = {
 
     addHotKeyArray: function(name, bindings, callback,
                              flags=Meta.KeyBindingFlags.IGNORE_AUTOREPEAT,
-                             allowedModes=Cinnamon.ActionMode.NORMAL) {
+                             allowedModes=Cinnamon.ActionMode.NORMAL |
+                                          Cinnamon.ActionMode.POPUP) {
         let [existing_action_id, entry] = this._lookupEntry(name);
 
         if (entry !== undefined) {

js/ui/windowManager.js

@@ -445,12 +445,6 @@ var WindowManager = class WindowManager {
         return this._seenWindows.has(metaWindow);
     }
 
-    _filterKeybinding(shellwm, binding) {
-        // TODO: We can use ActionModes to manage what keybindings are
-        // available where. For now just disable this, things are handled
-        // in Main._stageEventHandler.
-        return false;
-    }
 
     onSettingsChanged(settings, key, data=null) {
         if (key === "desktop-effects-workspace") {