[libnotificationmanager] introduce the WatchedNotificationsModel
Summary: This allows one to subscribe to notifications from notification server.
Test Plan:
tested using very simple QML
import QtQuick 2.0 import org.kde.notificationmanager 1.1 as Notifications ... Notifications.NotificationWatchedModel { id: model }
Reviewers: Plasma, broulik, davidedmundson
Reviewed By: Plasma, broulik
Subscribers: nicolasfella, plasma-devel
Tags: Plasma
Differential Revision: https://phabricator.kde.org/D28509