Q_ASSERT(m_splitter->count() == 1);
m_splitter->addWidget(createNavigatorWidget(Secondary));
Q_ASSERT(m_splitter->count() == 2);
Q_ASSERT(m_splitter->count() == 1);
m_splitter->addWidget(createNavigatorWidget(Secondary));
Q_ASSERT(m_splitter->count() == 2);