fix filebrowser touch (related to f2462cff81).

the fix in commit f2462cff81 broke split screen.
this commit properly fixes the touch and split screen buttons.

sphaira/include/ui/widget.hpp

@@ -62,6 +62,12 @@ struct Widget : public Object {
         m_actions.clear();
     }
 
+    void RemoveActions(const Actions& actions) {
+        for (auto& e : actions) {
+            RemoveAction(e.first);
+        }
+    }
+
     auto FireAction(Button button, u8 type = ActionType::DOWN) -> bool;
 
     void SetPop(bool pop = true) {