Added base classes for plugin UI.

core/service.h

@@ -48,6 +48,16 @@ public:
         tx.commit();
     }
 
+    void update(QSharedPointer<T> entity) {
+        odb::database *db = Context::instance().db();
+
+        Q_ASSERT(db);
+
+        Transaction tx;
+        db->update(entity);
+        tx.commit();
+    }
+
     QSharedPointer<T> loadById(int id) {
         odb::database *db = Context::instance().db();