For livetrax, ::add_routes_inner calls ::reassign_track_numbers,
which in turn calls ::livetrax_queue_auto_connect.
This can result in a deadlock:
* GUI thread, ::add_routes_inner holds the process-lock
and ::livetrax_queue_auto_connect requests the `_auto_connect_queue_lock`
* auto-connect thread first takes the `_auto_connect_queue_lock and then
requests the process-lock
Robin Gareus
0b6e68869f
