egui-winit: Fix shift key getting stuck with shift:both_capslock X11 option set

[5225225]

Closes #844.

[5225225]

One thing I'm confused about is https://docs.rs/winit/0.25.0/winit/event/enum.WindowEvent.html#variant.ModifiersChanged, which says

Web: This API is currently unimplemented on the web. This isn’t by design - it’s an issue, and it should get fixed - but it’s the current state of the API.

But the way I'm using it now seems to work?

At least, the Inspection window seems to show the keys I press? Am I missing something else that sets the modifiers, or does it actually work on the web nowadays?

[emilk]

@5225225 egui-winit is not used by egui_web (the web-backend of eframe). egui-winit is so far only used for compiling to native.

[emilk]

Works well on Mac! Thanks