Moved scene behaviors into common
- add edit pane background
- add Clearall action
- impl the Edit popup, undo/redo command action
- disable toolToggle when in edit mode
Edit mode in View api
- change mixer labels to numbers for now
- create clear and clear all actions for patterns
- set step sequencer collapsed first by default in the pane
Fixed bank/pattern redraw
Song sequencer proto impl
- Step sequencer beat numbers use wrong font
- Center display and Step sequencer cannot be show at the same time.
- Need one more toggle button in Studio for sequencer/controls
Major UI refactor, in the middle of it.