Hi
When working on a single (and small) monitor setup I am constantly collapsing and moving the panels of Photoshop, Indesign and Illustrator because that specific panel is hidden behind another expanded panel.

This should fix that problem and should save me multiple clicks:
The option to expand panels when hovering over the panel's icon and auto-collapse them when the mouse leaves the expanded panel. The workspace stays clean that way and I don't need to constantly close unused panels.