Changes the active row of @combo_box to the one that has an ID equal to
@active_id.
If @active_id is %NULL, the active row is unset. Rows having
a %NULL ID string cannot be made active by this function.
If the [property@Gtk.ComboBox:id-column] property of @combo_box is
unset or if no row has the given ID then the function does nothing
and returns %FALSE.
Changes the active row of @combo_box to the one that has an ID equal to @active_id.
If @active_id is %NULL, the active row is unset. Rows having a %NULL ID string cannot be made active by this function.
If the [property@Gtk.ComboBox:id-column] property of @combo_box is unset or if no row has the given ID then the function does nothing and returns %FALSE.