Nouveau: Group members page doesn't load when both Activity and Notifications components are disabled

[r-a-y]

Reported here:
​https://buddypress.org/support/topic/bug-membership-list-in-groups-does-not-show/

I've confirmed the problem. Both the Activity and Notifications components need to be disabled in order to duplicate the bug.

[r-a-y]

01.patch fixes the problem by merging the needed group objects outside the foreach loop.

I tested this briefly and it appears to work. @imath, can you take a look at this to make sure this is the right approach?

Update - Just added 02.patch. I think this is cleaner.

[imath]

Thanks a lot @r-a-y for your work on the patches. I confirm it's fixing the issue and that the approach is safer, let's commit 02.patch.

[r-a-y]

In 12239:

Nouveau: Fix AJAX loading of group members page when the Activity and Notification components are disabled.

Problem was due to the way the required group objects were not being
initialized properly.

Props brianbws.

Fixes #7969 (3.x-branch)

[r-a-y]

In 12240:

Nouveau: Fix AJAX loading of group members page when the Activity and Notification components are disabled.

Problem was due to the way the required group objects were not being
initialized properly.

Props brianbws.

Fixes #7969 (trunk)