- snap to measures on x axis
- when dragging, when mouse moves outside the scrollpane, needs to scroll horizontal
- impl min/max drag on measure count
- get little image of synths for machine icon
- grid lines should use a grid pixel skin that is not a 9 slice
- 2px left pad on machine image
- adjusted selection track clip appearance
- display current start measure while dragging
- when dragging a clip change visual state if the current position is occupied by existing clip
- remove scrollbar skins from mixer pane
- don't allow focus scrolling on mixer pane
- factor in scrollbar thickness on track pane (always show)
- added some clip widget composites play/stop
- CursorManager cursor on mouse over trim