Rename Shuffle to Random [Done]

[Andreasvb]

Shuffle isn't shuffle, rename to Random.
Don't change the function, rather consider make both an option.

[Tom]

That's a good point, since I didn't get round to writing good shuffle code yet.

Good shuffle should play the whole list once (unless on repeat), shouldn't play duplicate entries, and the back/next buttons should work in shuffled order as long as the shuffle button isn't depressed/pressed again.

[Andreasvb]

Correct, and in that case I would like to request a Random-function as well, I never use shuffle myself.