[Bf-funboard] floating windows don't stay on top!

[david j]

I think the feature we're talking about is not really "always on top"
windows, but more "tool palette windows" ala Photoshop. These are always on
top of the other windows of the same app, but not windows from other apps.

On macos, i think these are called "inspector windows", and they generally
disappear when another app is active.

I think it would be nice if preferences opened in a window that stayed on
top of other blender windows.

As for other cases, I don't think I would use it, but I agree it doesn't
hurt users who don't use it, and it's a pretty trivial amount of code to
add it to ghost on three platforms.