Implement Admin Set Managers

[mjgiarlo]

When a user or group is added to the list of managers for an Admin Set, they should be able to:

• See the Admin Sets UI with the Admin Sets to which they have access
• Edit an Admin Set's descriptions, participants, visibility, and workflow
• Edit all works in an Admin Set
• See all works in an Admin Set even if suppressed and advance the works through workflow

[mjgiarlo]

@hannahfrost Can you QA this to see if we can close the issue? (I suspect we can but I don't want to be hasty.)

cc: @jcoyne

[hannahfrost]

@mjgiarlo Need to leave this open. I find that the functionality described in Hyku#1110 is not in Hyku based on testing today.

[mjgiarlo]

@hannahfrost I'm not sure we've updated Hyku in a while. Worth testing again once we do that.

[mjgiarlo]

Closing.