Re: Let mode-line packages distinguish the selected-window

[martin rudalics]

> That's the behavior I see too and I am not sure which I prefer either.
> It probably would make sense to officially support both variants, add
> a control an option and make sure it is always respected (i.e. that
> weird code like what I posted thoes not have an effect).

Looks like some initialization problem.  Here, with emacs -Q when I do
C-x 5 2 followed by C-h f and then move the mouse to the first frame,
both windows get the active face.  Clicking now into the first frame's
window, makes that window the only active window.  Moving the mouse now
into the second frame's window makes both windows inactive.  Clicking
now into the second frame's window makes that window active and from
now on moving the mouse between the two frames activates the window on
the frame that has the mouse cursor in it.

Note that in all cases "window" stands for the "normal" and not the
minibuffer window.  Tested with a MinGW Windows 10 build of Emacs 26.

martin