Improving patterns

Same as an earlier suggestion with scenes, rather than having a create delete pattern workflow every bank created/loaded comes with its 128 new/saved patterns.

Track helper window has a really useless header label that crashes when you try to use it. Essentially it contains th name of the bank with a mute solo control. It’s not needed because the mute solo function is accessed in multiple other areas of the app. Replace the bank label in the track helper pattern window with a consolidated play stop control at the top instead of the bottom of the window. The play stop control controls whether the bank is playing in track. I’m very sceptical that this is needed in the pattern window. Just make it play the active pattern and let the track playing be controlled in song arranger mode.