Revised "Add Members" action for evr/group: select multiple people from

a filtered list and batch-add them to the group.

The action is available from the group/members tab - click "Add Members" to start the workflow:

1) Open the group
2) Go to the "Members" tab
3) Click "Add Members"
4) Select people from the table, then click "Add as Group Members" in the table

I didn't yet add a filter for "recently added" - but will do so when I get around to it (need to work on some priority tasks first).