[ticket/12146] Added a missing # to inline css-style of <span>

PHPBB3-12146
Merge remote-tracking branch 'Crizz0/ticket/12146' into develop-olympus

* Crizz0/ticket/12146:
  [ticket/12146] Added a missing # to inline css-style of <span>
Merge branch 'develop-olympus' into develop

* develop-olympus:
  [ticket/12146] Added a missing # to inline css-style of <span>

Conflicts:
	phpBB/styles/prosilver/template/ucp_groups_manage.html