[select] Fix getValue in the UNSELECTED KEY case: return null. Fix #471
[select] Fix getValue in the UNSELECTED KEY case: return null. Fix #471

get-focus/focus-components,sebez/focus-components,sebez/focus-components,asimsir/focus-components,KleeGroup/focus-components,JabX/focus-components,KleeGroup/focus-components,asimsir/focus-components,JabX/focus-components