Set the event type from the event handler instead of
determining the event type at run-time based on string
comparison.
QWasmDeadKeySupport adds a complication. This can't be
easily simplified or removed since it maintains state.
Change-Id: Iad6f02ee7e2dc22817d7ac606514a2b4022f8fb0
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
Reviewed-by: Even Oscar Andersen <even.oscar.andersen@qt.io>