app/tests: Do not run ui window_roles test under Wayland
app/tests: Do not run ui window_roles test under Wayland
window_roles uses GDK API which is know to not work on Wayland, and is declared unfixable in GTK 3. This change determines the session type via the XDG_SESSION_TYPE environment variable and only runs the test if it is not set to "wayland". Attempts to fix issue #12534 (closed).