When pressing Ctrl+Space, KeyEvent::text_with_all_modifiers would return
\0. That would get included in the text-input text. When an input method
gets activated, the invalid string returning \0 would get sent as
surrounding text, resulting in a Wayland protocol error and crashing the
application.
The API is integrated into the `WindowEvent::Pointer*` API and is
present in form of `TabletTool` variant on corresponding data entries.
For now implemented for Web, Windows, and with limitations for Wayland.
Fixes#99.
Co-authored-by: daxpedda <daxpedda@gmail.com>
Generally, winit-core doesn't know about underlying platforms, though,
some general information which will true for any implementation was
left in place.
