bug#22466: 25.0.50; disable-theme apparently forces a redisplay and causes a screen flash

[Drew Adams]

> > On my todo list there is also writing tramp-theme.el. Something, which
> > makes it obvious that you are editing a remote file, or not. Even more
> > important: you are editing a file as root, or not.
> >
> > This could fall into the category of enabling-disabling the theme more
> > often than just at the start of your session.
> 
> I hope that theme won't change my frame's background color ;-)

I heard that Michael is working on a special background color
that will take effect only when the user is Eli Zaretskii.