[FVWM2] Games full-screen broken with Steam Proton

With Proton 5.13 games can’t enter full-screen correctly. It’s fine with Proton 5.0. Also fine with other WM and DE.

More info here:

Full-screen broken with native games too (The Witcher 2).
Using fvwm-2.6.9, default config.

Try adding
Style “*” ResizeHintOverride
to your config.

This worked with Yamagi Quake 2, which would start in a window otherwise.

Thanks BoraxMan, this works for Witcher 2 but not for Proton.