when closing menu, focus the button
when closing menu, focus the button

mcl-de/jquery-ui-multiselect-widget,GerHobbelt/jquery-multiselect,mcl-de/jquery-ui-multiselect-widget,mcl-de/jquery-ui-multiselect-widget,GerHobbelt/jquery-multiselect,GerHobbelt/jquery-multiselect