prevent the enter key from submitting the form/closing the widget when focus is on the input
prevent the enter key from submitting the form/closing the widget when focus is on the input

gs-akhan/jquery-ui-multiselect-widget,GerHobbelt/jquery-multiselect,anakinj/jquery-ui-multiselect-widget,SomethingSexy/jquery-ui-multiselect-widget,gs-akhan/jquery-ui-multiselect-widget,SomethingSexy/jquery-ui-multiselect-widget,GerHobbelt/jquery-multiselect,r4j4h/jquery-ui-multiselect-widget,mcl-de/jquery-ui-multiselect-widget,webbers/dongle.js,PANmedia/ui-multiselect-dropdown,PANmedia/ui-multiselect-dropdown,mcl-de/jquery-ui-multiselect-widget,SomethingSexy/jquery-ui-multiselect-widget,webbers/dongle.js,mcl-de/jquery-ui-multiselect-widget,GerHobbelt/jquery-multiselect,webbers/dongle.js,r4j4h/jquery-ui-multiselect-widget,gs-akhan/jquery-ui-multiselect-widget,anakinj/jquery-ui-multiselect-widget