It may not be immediately obvious that the windows section is a
list of open application windows, as titles like "Downloads" can
easily be confused with an action. Add a section heading to avoid
confusion.
https://gitlab.gnome.org/GNOME/gnome-shell/issues/968
this._windowsChangedId = 0;
+ /* Translators: This is the heading of a list of open windows */
+ this.addMenuItem(new PopupMenu.PopupSeparatorMenuItem(_("Open Windows")));
+
this._windowSection = new PopupMenu.PopupMenuSection();
this.addMenuItem(this._windowSection);