Fix room switch so that if there is no saved text the user ends up with an empty chatbar

autotests/modeltest.cpp

@@ -399,12 +399,7 @@ void ModelTest::testCompletionModel()
     tester->setUseFetchMore(true);
     model->setRoom(room);
     model->setAutoCompletionType(CompletionModel::Room);
-<<<<<<< HEAD
-    model->setText(u"foo"_s, u"#foo"_s);
     auto roomListModel = new RoomListModel(this);
-=======
-    auto roomListModel = new RoomListModel();
->>>>>>> da60b8068 (Fix merge issues)
     roomListModel->setConnection(connection);
     model->setRoomListModel(roomListModel);
 }