On macOS 26+ the window drop was leading to unwrap, since
events were coming after the window was already destroyed,
while it sounds rather strange, guard against such things just
in case.
Fixes#4333.
Allow updating IME state atomically to make it easier for platforms
where it's atomic by its nature, like Wayland. The old API is marked
as deprecated and is routed to the new atomic API.
Co-authored-by: dcz <gilapfco.dcz@porcupinefactory.org>
