@ db: - trigger notification design pattern
@ modules/authModule/controllers/indexController.php: working on connection based signins
@ core/ui/html/avatar.php: a bug fixed
@ core/db/models/item.php: massive improvements
+ after_save_update_notifications(): we let 'core/db/models/item.php' handle notifiction output flows from now on
@ modules: compatible changes with 148c9ac