Is this in my head or do I correctly recall the SKP default tray of old having the ability to only have 1 sub-tray open at a time. i.e. opening (or dropping down) the entity info tray, as example, would automatically close any other open tray by default such as the tag tray or material tray or other.
Currently, I’m constantly having to stretch and shrink the trays and resize them to accommodate and fit whatever tray I need to use at that specific time but I recall in the past that I could essentially just pick whatever tray and it would open automatically and because it was only 1 open tray at a time - it always fit making it more functional and faster.
I’m getting old. Maybe it’s a fake memory or maybe it was done with a plugin? Is there a way to do something similar now? Did that exist and it no longer exists? 
