chart editor improvements

[inky03]

re-adds most vortex editor functionality abandoned from 0.7 to 1.0, improves and adds a couple other features like adding a 3 waveform view and textured editor sustains

[Josephjr05]

Just missing the downscroll (Reverse scroll) option🙏
ArrowVortex has it.

[DMMaster636]

this is some nice stuff!
i do have a few nitpicks at the waveform part, but overall this is pretty solid
maybe you could also add a both vocals option, since that seems pretty useful