Selectmenu tests: check for too much fired focus events
Selectmenu tests: wrong selected item when using keyboard control on button and focusing menu item before
Selectmenu: menu focus reset when menu is closed, prevents issues when using keyboard control on button when focusing menu item before
Selectmenu: aria-activedescendant should be set when item is selected, not when menu is closed
Selectmenu: menuItems now contains link elements instead of list elements