[Ardour-Dev] Track order sync between editor/mixer in 2.1

[Dan Tepper]

I use a control surface, so when the order onscreen doesn't match my
physical faders, it is very annoying.

It looks like Ardour 2.1 tries to sync track list order between the
editor window and the mixer window. This behavior is new in 2.1.
Unfortunately, it does not appear to work terribly well if i make
changes in both track lists, they get scrambled easily. Even worse, v
2.1 has also segfaulted a few times while i'm re-ordering the tracks.