widgets: label: Unify functions on foo_bar_set()
widgets: label: Unify functions on foo_bar_set()

The rest of the functions have set at the end the
gp_widget_label_size_set() should match.

Signed-off-by: Cyril Hrubis <b1e90efd3b808b8e0bcf2a9a55fd8b9a779bfd81@ucw.cz>

gfxprim/gfxprim,gfxprim/gfxprim,gfxprim/gfxprim,gfxprim/gfxprim,gfxprim/gfxprim