Enhance Radio Mode

[MeoMix]

Radio mode needs a few changes:

• The toggle radio mode button needs to be permanently visible.
• There needs to be a thumbs up / thumbs down button to make things permanent.
• If it its thumbs down in the radio mode it deletes it, if its thumbs downed in playlist mode it lowers priority.
• When a song is added in radio mode it should be a ghostly color. There should be an obvious button to make the song permanent to the playlist.
• There should be the ability to clear all ghostly playlist songs from the playlist.

- Thumbs upping a song will make it permanent, thumbs up a song that is permanent will make it higher priority.