Dismiss overflow popup when overflow button is detached.

library/src/com/actionbarsherlock/internal/view/menu/ActionMenuPresenter.java

@@ -621,6 +621,8 @@ protected void onDetachedFromWindow() {
             for (View_OnAttachStateChangeListener listener : mListeners) {
                 listener.onViewDetachedFromWindow(this);
             }
+
+            if (mOverflowPopup != null) mOverflowPopup.dismiss();
         }
 
         @Override