Summary: WS_DISABLED style should be used to fix some modality bugs
Reviewed-by: art, son

Summary: added support for high-resolution mouse wheel
Reviewed-by: dav, son

Summary: AppContext.dispose() should be ready to get exceptions during disposal of toplevels.  Also now we mark windows peers as destroyed when native object has been destroyed.
Reviewed-by: art

Summary: Now we allow cross-process focus requests if focus is in embedder's process.
Reviewed-by: ant