search: fix for dissapearing search field text

• Typeahead also stores its query internaly in a variable, and resets to it on blur event of the input field. The query is normally updated when the text is typed by user. Using javascript it needs to be updated manually.

Signed-off-by: Kamil Neczaj <kamil.neczaj@cern.ch>
Reviewed-by: Jiri Kuncar <jiri.kuncar@cern.ch>