Squad/playlist removal with confirmation dialog

[hershal-rami]

[jhudis]

Added remove option for removing playlists: f73ddfe

[JMS55]

Need to test calling the delete API without the right/any params.
Also, when it comes time for deleting squads, only the leader should be able to.

[JMS55]

We should add confirmation dialogs to deleting either of these things as well.

[JMS55]

Add confirmation for playlist deletion: 4961e8f

We still need to add deletion for squads