Track sorting, selecting and folding

[chkworks]

Sorting tracks by dragging and dropping would be a great feature. Right now this has to be done using the “Order Index” in the Inspector (why is this actually a float?) It is already possible to multi-select tracks by holding Ctrl and click on them one after the other and to delete all selected at once. Also it would be great to implement holding shift to select all tracks between the first and last one. It would be great if it worked like in Ableton, that also all selected tracks fold and unfold. Like this, the global fold and unfold buttons could be gone.