Implemented - [Feature Request] Hide Collections with only 1 item

[OttoKerner]

1. select all movies (hold down Shift and click on the first poster, then scroll down, hold Shift and click on the last poster)
2. click the edit button
3. “lock” the collection field and hit save
4. click the edit button
5. “unlock” the collection field and hit save
6. refresh all metadata