Is there a way to make trays drop down?

I’m putting this in feature request because I don’t believe it’s possible now.

But just in case it is already possible - is there a way to make trays that have only one tab drop down and have the tray resize to the height of the tab? I like having the trays separated, but when I’m working without a second screen, they take up a lot of screen space. It would be great if when you hit the drop down button, the size of the tab expanded or decreased to the size of the content within it.

I’ve attached a video here that shows more or less what I mean.
Trays video

Normally, if you click on the Tray’s Title Bar, it should expand and another click shall contract it.