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.
-- v3: win32u: Stop setting DPI_PER_MONITOR_AWARE by default. explorer: Make the desktop thread per-monitor DPI aware. user32: Move dpiaware_init to SYSPARAMS_Init. server: Pass window's per-monitor DPI in set_window_pos. win32u: Pass window_from_point dpi to list_children_from_point. win32u: Map rect to window DPI in expose_window_surface. winex11: Map message pos to physical DPI in move_resize_window. winewayland: Remove unnecessary logical to physical DPI mapping.