AXS-366 - Last keyword inserted wrongly

Created by: rvetere

Improved the behavior of "bootstrap-tagsinput"... when a user enters a text and ends with a coma, but just hit "tab" then instead of "enter".. he will leave the field, the tag is created but the input text remains what feels buggy to the user..

i've added a little clear-timeout to clear this input whenever this case happens. It doesn't destroy anything on the basic feature.