Allow changing the GTK+ (widget) theme from the greeter. Currently this only affects the standard greeter. The theme will stay in effect on this display until changed and will affect all the other windows that are put up by GDM.
Baimendu GTK+ (trepeta) aldatzea ongietorriaren interfazetik. Unean honek ongietorriaren interfaze estandarrean soilik eragiten du. Gaia egoten jarraituko du pantailan aldatu arte eta GDMrekin jarri diren beste leiho guztiei eragingo die.