Clicking around the input and changing cursor position does not change autocomplete filter

[mizzao]

Changing the cursor via mouse does not update the autocomplete menu (due to this being handled in the onKeyUp) function of the AutoComplete class. The only other place this logic is also triggered is in onFocus.

We can simply add an onClick handler to tackle the basic case of this, but it requires more thought to decide what to do for drags and selected regions. Maybe the autocomplete should just go away during that time.