Grade-bar while playing & ability to save loops for songs

[Alexlindgren]

Would be awesome to have two functions:

1) Ability to see what grade you are currently performing at while playing (then one you get when finished the song). Also to see if you play at 100% at what level of speed you are actually able to press the key right (compared to if you would have pressed all keys right with 100% in speed).

2) Ability to save a number of looks - for sections you are working at, and be able to switch between for example loop 1 and loop 7.