WebSearch: FulLText:higgs snippet display fix
WebSearch: FulLText:higgs snippet display fix

* For camel case queries of the form `FuLtEXt:higgs`, i.e. when the search
  operator was not spelled in the usual all-lowercase form, the search was
  working fine but the full-text snippets were not displayed.  This patch
  fixes the problem.

inveniosoftware/invenio,tiborsimko/invenio,inveniosoftware/invenio,tiborsimko/invenio