The "preview" state is now a expar field. Tec read is temporary
suspended when in preview mode (focus and fast speed), to get
maximum frame speed. It can however be reactivated by will, in
that case program will do it's best to manage the situation.
Tec read will be reactivated upon "preview mode" leave (capture
or speed set to slow).
Updated the capture size message to give evidence that we are in
"Full frame" mode, but there are other choices available.
Also fixed abnormal cpu consumption during long wait (timelapse,
capture hold and long time capture). Tested on both single core
and double core systems.
Last but not least changed Qhy6Old Binx2 width to be a multiple
of 4 in hope this can fix an issue with registax not being able
to use the resulting avi.