* glom/mode_data/box_data_portal.[h|cc]:
* glom/mode_data/box_data_calendar_related.[h|cc]:
* glom/mode_data/box_data_list_related.[h|cc]:
Remove the just-added do_add_record() virtual method.
Instead add a Box_Data_Details and parent window to Box_Data_Portal,
used to show a details window for a new related record in
on_maemo_appmenubutton_add().
Move some code from Box_Data_List_Related::on_adddel_record_added() to
Box_Data_Portal::make_record_related() to make this easier.