Set DpiAwareness to permonitorv2; fallback to older implementations at runtime

See https://learn.microsoft.com/en-us/windows/win32/hidpi/setting-the-default-dpi-awareness-for-a-process

The current DpiAware/DpiAwareness level (which is probably 'unaware') leads to the GUI being bitmap scaled (and blurred) when the DPI changes e.g. when moved from a display with 125% display scale to one with 100% display scale.

Scaled to 125% display.

Scaled to 125% display then moved to a display with 100% display scale.