Keep menu open after selecting a item
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I need my menu (opened by a menubutton) to stay open after you select an item from the menu. So that you can select more then one items before it closes (by clicking outside of the list)

I couldn't find anything in the api, so i hope you guys know the trick

Another solution would be if you hover over the button, then the menu opens. When you leave the menu with your mouse, the menu would close.

Thanks in advanced