Fix issue when clicking scrollbar in IE and Chrome.

Change-Id: I8914fd9f025a7fe2f8a6b2da58813badaf77b416
Minor fixes; allows to show list even when no letter has been typed, but
a keyup event has been fired at the input element

Change-Id: Ie0795bbc9edfed98d71603b9742a9123f8db975a