Scale helper to convert logical scaler values to physical using passed in scale factor

Dynamically loads the |EnableNonClientDpiScaling| from the User32 module. This API is only needed for PerMonitor V1 awareness mode.

Returns the singleton registrar instance.

static

Implements GObject::dispose.

Implements GApplication::local_command_line.

Implements GApplication::shutdown.

Implements GApplication::startup.