Save queue as playlist or add to existing one, and some menu modifications

[BaccanoMob]

This is for ease of creating a playlist inside the app.

Currently, you can add songs to playlist in one by one.

It would great to include the below options

• Save Queue as Playlist
• Add Queue to Playlist

while some options should be renamed

• Add to Playlist => Add Song to Playlist
• Add to Next Up => Add Song to Next Up
• Add to Queue => Add Song to Queue

Add favorite could be removed since its displayed in now playing screen. But that IconButton needs to be included in the track tiles inside individual Albums/Artist/Genre or in Tracks tab for ease of liking a track rather than opening a menu. Or If displaying the IconButton needs to be avoided in track tile for some reason, alternative could be swipe left to add to queue (currently swiping does this action only) and swipe right to favorite it.

Also Public/Private settings as requested in #879 should apply here as well if a new playlist is created.