Sort members by name

[agross]

What does this PR do?

Comparable to #963: We have many entries on the non-admin members page that are currently unsorted and hard to manage. This PR adds sorting by members' user names.

I don't know if there is a more effective way, given that users have been eagerly loaded before this PR. I'm not sure if users are loaded twice now: once via eager loading with with, and now a second time by now joining them to members.

I tried adding orderBy to the with clause to cause the member list to be sorted by user name. But that will only sort the eagerly loaded user list without causing the desired effect.

Checklist (DO NOT REMOVE)

• I read the contributing guide
• I signed the Contributor License Agreement.
• I commented my code, particularly in hard-to-understand areas