[Enh] Randomization options for new "Metronome w/Tags" Dialog

[kylegrymonprez]

Something requested that seems powerful that I implemented:

• Added the ability to add randomized timing intervals between min and max. This will create random intervals in the new timing track.
• Added the ability to randomize the labels between 1 and X. This is useful for various state effects to give the appearance of randomization.

This gives various value curves implications on various effects as well.

[kylegrymonprez]

Related to #4829 as a solution to solve that request.