visually differentiate "always on top" windows

Submitted by unh..@..@mm.st

Assigned to Nick Schermer

Link to original bug (#13544)

Description

I have all my windows maximized. I somehow clicked "Always on top" on Emacs without meaning to, and then got frustrated when Firefox wouldn't show when I clicked it in the panel (thinking Firefox had crashed) – it took me a while to check the always-on-top-state of Emacs. A less experienced user might never have thought to check it.

Feature request: some sort of visual indication in the panel on the windows that are always on top. I don't know what a good indicator would be, perhaps bolded font or a background colour that is 70 % of the "active window" colour or just a "*" before the window title. This kind of feature might also make sense for "always hide" windows.

Version: Unspecified