Only use the gray color for fa-user inside of activities
Only use the gray color for fa-user inside of activities

This fixes a regression in which suddenly the icon on the users container of
the admin page looked inconsistent with the other icons.

Signed-off-by: Miquel Sabaté Solà <b4d70704b9e7df580cab34510621dbd0aacb2dfd@suse.com>

mssola/Portus,SUSE/Portus,morodin/Portus,bencevans/Portus,angry-tony/Portus-20170827,mssola/Portus,morodin/Portus,angry-tony/Portus-20170827,kwk/Portus,jloehel/Portus,SUSE/Portus,kwk/Portus,vpereira/Portus,SUSE/Portus,jloehel/Portus,armbuilds/portus,morodin/Portus,kwk/Portus,jloehel/Portus,mssola/Portus,krishnak9/Portus,armbuilds/portus,angry-tony/Portus-20170827,angry-tony/Portus-20170827,vpereira/Portus,krishnak9/Portus,bencevans/Portus,vpereira/Portus,krishnak9/Portus,krishnak9/Portus,SUSE/Portus,armbuilds/portus,bencevans/Portus,mssola/Portus