All adjustment setter functions take good care of avoiding emission of
notify:: when it's not needed. The set_property() implementation already
calls into the setter functions, so mark the properties as EXPLICITY_NOTIFY
in order to optimize notify:: emission away through g_object_set (rather
common from JS code).
(cherry picked from commit b1b455ff1a0e856149142747e77fb1c98df34c03)
Closes: https://gitlab.gnome.org/GNOME/gnome-shell/issues/1270
8702d6647b