If a console application supports mouse events (e.g. mc or vim in Sisyphus), terminology will stop processing these for selection even with Shift pressed but at the same time won't pass these to an application properly either. For mc-4.8.7-alt1 running in terminology-0.2.0-alt0.1, the clicks on the menu bar at the top translated into an equivalent of the <End> key moving the panel cursor to the very bottom of the panel.