win32u: Stop setting DPI_PER_MONITOR_AWARE by default.
This activates the new DPI scaling, and stops pretending that every window is per-monitor DPI aware. It uses the GDI scaled surfaces for DPI-unaware windows, instead of the current higher resolution surfaces, which gives more blurry results but this is the same as Windows for DPI-unaware cases.
Edited by Rémi Bernon