* Add and return a new section widget. If @title is given, a bold title * will be placed above the section. * * @param {str

* Add a new row to @section, populated from the Schema for @settings and * the key @keyName. A Gtk.Widget will be chosen for @keyName based o

* Add a new row to @section and return the row. @summary will be placed on * top of @description (dimmed) on the left, @widget to the right o

* Add and return new row with a Gtk.Grid child * * @param {Gtk.ListBoxRow|Row} [row] - The row to add, null to create new *