add video osd configuration
fix bug for ddraw used for VideoDialog

TODO:
ddraw init in VideoDialog initialization need optimized
add vf and 2a configuration

TODO:
2A config to be done using fpga
ReInitDDraw according to image resolution
update video config dialog view for each channel
test for save avi file
add client configuration
add 2A mode switch
support scroll video dialog

TODO: maximized video dialog