Can now limit window to vessel that created it

Window shows and hides as you [] through vessels.
Saw a bug once:
Craft 1: TWT craft
Craft 2: TWT craft
Craft 3: Stock Aeris 3a ditched in sea off end of runway
switch between 1 and 2 with [] no problem.
1->2->3->2->1 however and a dupe window appeared on craft 1.
No dupe window on craft 2.
No window showed on craft 3.
Did not replicate with a stock 3a parked off side of runway in OK state.