Pixel aspect ratio for 7'' display

[the_bertrum]

Seems we have run into the reason why hardware manufacturers eventually stop offering software updates. If moOde were a physical box that shipped with a screen, then v8 devices would now just stop getting updates and anyone wanting v9 would have to buy a new box. Hopefully Pi OS will get an update that fixes non-square pixels at least, even if they can't do anything about panels that claim resolutions they can't display.