connect(ui.operationMode, SIGNAL(currentIndexChanged(int)), SLOT(switchOperationMode(int)));
connect(ui.showHighlights, SIGNAL(toggled(bool)), SLOT(widgetHasChanged()));
connect(ui.showOwnMessages, SIGNAL(toggled(bool)), SLOT(widgetHasChanged()));
connect(ui.operationMode, SIGNAL(currentIndexChanged(int)), SLOT(switchOperationMode(int)));
connect(ui.showHighlights, SIGNAL(toggled(bool)), SLOT(widgetHasChanged()));
connect(ui.showOwnMessages, SIGNAL(toggled(bool)), SLOT(widgetHasChanged()));