Comment 8 for bug 1823065

Reviewed: https://reviews.mahara.org/9744
Committed: https://git.mahara.org/mahara/mahara/commit/50125de2ae344b86c93152b7ccf50a0fc485cace
Submitter: Cecilia Vela Gurovic (<email address hidden>)
Branch: 19.04_STABLE

commit 50125de2ae344b86c93152b7ccf50a0fc485cace
Author: Robert Lyon <email address hidden>
Date: Thu Apr 4 14:27:59 2019 +1300

Bug 1823065: Site staff should not see users outside 'no institution'

When $cfg->isolatedistitutions are turned on because if they can and
message a user that user can't reply to them

Also fixed default filter option from throwing error if current user
is in no institution

Also fix up online users - consolidate duplicate code and restrict
non-admins in no institution is isolated institutions is turned on

behatnotneeded

Change-Id: I5828147461f513bb392598d62337d417e631e6f2
Signed-off-by: Robert Lyon <email address hidden>
(cherry picked from commit 279c33c42106db66c80fbd0a9900d53196fc2a27)