Groups: Fix notifications not being cleared on certain screens.

The 'do_action' hooks were referencing the wrong actions for the
group home and group invites pages.  Thus, notifications were not
being cleared on those pages.

Fixes #5282.

Props imath.

git-svn-id: https://buddypress.svn.wordpress.org/trunk@7653 cdf35c40-ae34-48e0-9cc9-0c9da1808c22
POT, generated from r7653

git-svn-id: https://buddypress.svn.wordpress.org/trunk@7654 cdf35c40-ae34-48e0-9cc9-0c9da1808c22