WebStyle: new invenio_pretty_date() jinja2 filter
WebStyle: new invenio_pretty_date() jinja2 filter

Co-authored-by: Konstantinos Ntemagkos <b6d5c97ccd06df79b737d836cf386896d239447a@cern.ch>

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