WinGui:  For Point to Point Frames: Use Numeric Up Down Control.   For PTP Seconds, use Timespan Up down so the user can enter a time in format hh:mm:ss

git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@5199 b64f7644-9d1e-0410-96f1-a4d463321fa5