While the label for the OARS pseudo-combobox was updated when loading a
user’s app filter, the internal state (`self->selected_age`) was not.
Similarly, the set of restricted apps wasn’t loaded until the restricted
apps dialog was opened.
This caused problems when loading a user’s parental controls and then
editing a control which *wasn’t* restricted apps or the OARS level. The
resulting app filter would be built using default values for those two
controls, overwriting and losing their previous values when it was
saved.
Signed-off-by: Philip Withnall <pwithnall@endlessos.org>