Replace references to NTSC-U with the correct NTSC-U/C and adds Canada in user-facing strings.
Replaces all region flags with revised SVGs.
Brings the US flag down to 3:2 to match Europe and Japan.
Adds a custom split US & Canada flag for the U/C region, also 3:2.
Generated PNGs and new HiDPI PNGs for region flags.
Flag PNGs were generated by downscaling using a Lanczos filter to a width of 36/72 pixels, then a 1px grey border added, then a 2/5px transparent border.
Remove mistakenly leftover icons.qrc file, which has been superceded by resources.qrc and causes build to fail if existing items in icons.qrc are removed.
