[REQ] Option to mass-delete files without deleting series from NzbDrone

Feature Requests
1

It would be nice to have some sort of delete files button for seasons. Now we can mass delete files only when we delete series from NzbDrone.

2

See here https://trello.com/c/0eiAYXSg/240-auto-delete-episodes-after-certain-criteria-is-met

3

Also: https://trello.com/c/75MOaJ92/397-manage-season-quality-and-delete