fix #1023, build error

--missing translation function with two
arguments

app/settingsdialog.cpp

@@ -857,7 +857,7 @@ void SettingsDialog::loadSettings()
     m_model->setHorizontalHeaderItem(NAMECOLUMN, new QStandardItem(QString(i18nc("column for layout name", "Name"))));
     m_model->setHorizontalHeaderItem(MENUCOLUMN, new QStandardItem(QString(i18nc("column for layout to show in menu", "In Menu"))));
     m_model->setHorizontalHeaderItem(BORDERSCOLUMN, new QStandardItem(QString(i18nc("column for layout to hide borders for maximized windows", "Borderless"))));
-    m_model->setHorizontalHeaderItem(ACTIVITYCOLUMN, new QStandardItem(QString(i18n("column for layout to show which activities is assigned to", "Activities"))));
+    m_model->setHorizontalHeaderItem(ACTIVITYCOLUMN, new QStandardItem(QString(i18nc("column for layout to show which activities is assigned to", "Activities"))));
 
     //! this line should be commented for debugging layouts window functionality
     ui->layoutsView->setColumnHidden(IDCOLUMN, true);