WebStyle: debug toolbar only for super admin
WebStyle: debug toolbar only for super admin

* NOTE: Updates version of Flask-DebugToolbar. Please run
  `pip install Flask-DebugToolbar==0.8.0 --upgrade`.

Signed-off-by: Jiri Kuncar <2bdffcb416fed3002465740d19a053a39918cbe5@cern.ch>

inveniosoftware/invenio-base,tiborsimko/invenio-base,tiborsimko/invenio-base,inveniosoftware/invenio-base