This binds all the '*-set' properties. The properties are useful when one
wants to restore a previously set property to its initial value. For instance,
when setting the ForegroundRgba property the 'foreground-set' property is
automatically set to 'true' but when we assign 'Gdk.RGBA.Zero' to ForegroundRgba then the
'foreground-set' property is NOT set to false and the foreground becomes black instead
of the default one.
This binds all the '*-set' properties. The properties are useful when one wants to restore a previously set property to its initial value. For instance, when setting the ForegroundRgba property the 'foreground-set' property is automatically set to 'true' but when we assign 'Gdk.RGBA.Zero' to ForegroundRgba then the 'foreground-set' property is NOT set to false and the foreground becomes black instead of the default one.