search: portalbox text overflow fix
search: portalbox text overflow fix

* FIX Fixes portalbox text overflow and and syntax error in CSS.
  (closes #3023)

Signed-off-by: Leonardo Rossi <5460ec99b71a72e7693c4088b5c2585e76e1c857@cern.ch>

inveniosoftware/invenio-search,tiborsimko/invenio-search,tiborsimko/invenio-search,inveniosoftware/invenio-search