public void AddEffect(string category, Command action)
{
var effects_menu = PintaCore.Chrome.EffectsMenu;
if (!Menus.ContainsKey(category))
{
var category_menu = new GLib.Menu();
effects_menu.AppendMenuItemSorted(GLib.MenuItem.NewSubmenu(Translations.GetString(category), category_menu));
Menus.Add(category, category_menu);
}
Actions.Add(action);
GLib.Menu m = Menus[category];
m.AppendMenuItemSorted(action.CreateMenuItem());
}