No confirmation of started mass update tasks.

[calmcacil]

Describe the bug
No feedback on the various mass update checkboxes, clicking submit gives no feedback, however, when going into the stats page you can see it all have been queued up, just without any kind of telling the end user that their action has been done.

To Reproduce
Steps to reproduce the behavior:

1. Go to mass update.
2. Check any of the checkboxes for actions that are not "edit", I couldn't see any difference based on the boxes checked.
3. Click submit.

Expected behavior
Expected behavior would be showing a small message that the requested tasks have been queued up, and possibly unchecking the checkboxes so that one doesn't queue up duplicate jobs thinking that the first ones hadn't been started.

Medusa (please complete the following information):

• OS: Unraid
• Branch: Master
• Commit: 0.2.6