Introduced new CSS style for "Focus on", and "Search also" boxes. (Graphical example only, may be changed later.)  Also, fixed a typo in the color definition of externalcollectionsbox.
Introduced new CSS style for "Focus on", and "Search also" boxes.
(Graphical example only, may be changed later.)  Also, fixed a typo in
the color definition of externalcollectionsbox.

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