This updates winit and glutin to the latest git versions instead of
relying on releases to fix a build failure on BSD.
Unfortunately the upstream version bumps might still take a bit and
there hasn't been any feedback with regards to a planned release date.
This also fixes a slight issue on Windows where selections would start
when focusing a window and a build failure with some Linux systems
Fixes#2243.
Fixes#2170.
Fixes#2244.