libtorc-baseui: Use the widget size and position for media rendering.

- allows animation of the media widget
- still needs additional handling for the paused state
libtorc-core: Fix crash in TorcHTTPServer when exiting on windows.

HTTP connections are deleted with deleteLater and on windows, the parent
has been destroyed before the returning to the main event loop. So
manually close the server and use deleteLater as well.