Issue 2668: Allow mods to invite works to collections
Issue 2668: Allow mods to invite works to collections
'Add to Collections' button works for maintainers and work owner
Issue 2668: Allow mods to invite works to collections
Updating mailers and mailer logic
Issue 2668: Allow mods to invite works to collections
Issue 2668: Allow mods to invite works to collections
Added tests
Fixing more tests