Selectmenu tests: improve focus callback event test, add keydown focus test, add multiple focus events test
Selectmenu: do not call focus menu method when close method us used
Selectmenu: fire focus event when menu is opened
Selectmenu tests: improve all other focus callback event tests
Selectmenu tests: test if close event is fired when selectmenu is closed by click on body
Selectmenu: use that.focusIndex != null instead of !== undefined when checking first focus event
Selectmenu: remove unused var