- Major changes to way the embedded vout is handled.
    + the vout windows are created in our event thread so we do receive the events now.
    + we do not use the external window directly (as for normal vout we create our vout window + video sub-window).
    + Create a WS_EX_NOPARENTNOTIFY vout window to make mozilla happy.
  - Improved the mouse auto-hide feature.
  - Do the DirectXUpdateOverlay() in the events thread. This should make S3 graphics cards happy again.