There's another remaining bit of Gtk3 code in a small test program
that changes a window title to a random character sequence every
five seconds. While the value of that test is a bit questionable,
it doesn't hurt either and a port is trivial.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/2733>
Reposition the window overlay when the title changes, using the current
transformed size of the window clone.
Includes a test that changes title to a string of random length every 3 seconds.
Based on a patch by Alex Hultman <alexhultman@gmail.com>
https://bugzilla.gnome.org/show_bug.cgi?id=620874
