win32: holding Shift when resizing FCEUX window reverts "Force integral factors" meaning
win32: remodel "Video config" dialog:
* removed the list of predefined modes (they were broken anyway)
* removed FS stretching options (obsoleted by "Best Fit")
* removed broken display of "Current Pixel Aspect Ratio" (may return it after implementing the 4:3 mode)
* "Full Screen (hotkey: Alt + Enter or double-click)" - reads current hotkey mapping
[[Split portion of a mixed commit.]]