Fix crash when closing a tab.
TabbedViewWidget::removePage is called twice for the same page, which leads to crash on the second run. It is called by those two signals in mainwindow.cpp: connect(disconnectAction, SIGNAL(triggered()), SLOT(disconnectHost())); connect(view, SIGNAL(disconnected()), this, SLOT(disconnectHost())); BUG: 398878
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c390f8fb
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