fix context menu, fix filter on boards

src/models/board.cpp

@@ -99,6 +99,7 @@ const QJsonObject Board::toJson()
     }
     QJsonObject obj;
     obj[NAME_KEY] = this->name;
+    obj[UUID_KEY] = this->uuid;
     obj[TASKS_KEY] = array;
     obj[DESCRIPTION_KEY] = description;
     return obj;