Add keybind to disable mouse buttons

osu.Game/OsuGame.cs

@@ -466,6 +466,9 @@ namespace osu.Game
                 case GlobalAction.ToggleDirect:
                     direct.ToggleVisibility();
                     return true;
+                case GlobalAction.ToggleMouseButtons:
+                    LocalConfig.Set(OsuSetting.MouseDisableButtons, !LocalConfig.Get<bool>(OsuSetting.MouseDisableButtons));
+                    return true;
             }
 
             return false;