[WIN] fix dropped frames for Ion with auto deinterlacing

Some GPUs drop some progressive frames with a deinterlacing processor.

For those GPUs (or when an advanced setting is activated), change the Auto
mode to always use the prog. processor for progressive frames and deint. proc
for interlaced frames.

This comes at the expense of the switch speed between prog. and int. as the
processor must be recreated for each switch and there is no guarantee
about processor destruction/creation speed.