Revert "Fix fdo#84795 Menu, DropDown-List not disappears with right mouse click"

This reverts commit 53c836701e22b1babd3702b502facd76236df7ff.

because it means that all disabled buttons get their "click" delivered
so disabled buttons are only visually disabled.

e.g. writer: insert->table->autoformat, click on the disabled "rename" or "add"
or "remove" and the sub dialog appears. Or in calc insert->object->chart and
click on the disabled "back" -> crash