9aa6698bd0
Recoded the (2.65.1 version) region scale, which happened on loading files with different saved size windows. Also scaling window itself was affected. Old method: scaled region widths based on area/editor scaling factors. That was leading to too small or too large button regions easily. New method: region width/height now are in DPI control. Much nicer! - On changing dpi, buttons remain visually same widths. - On changing window sizes, the button views and zooms stick to exactly same. Caveat: people who were using Blender with 'extreme' dpi setting, might find the layouts slightly differ. Not sure if this is worth version patching... Todo: overlapping regions that overlap together draw badly. Fix underway.