Creates a new GtkImageMenuItem containing the image and text from a
stock item.
If you want this menu item to have changeable accelerators, then pass in
null for accelGroup. Next call setAccelPath() with an appropriate path
for the menu item, use gtk.StockItem.StockItem.lookup() to look up the
standard accelerator for the stock item, and if one is found, call
gtk.AccelMap.AccelMap.addEntry() to register it.
Creates a new GtkImageMenuItem containing the image and text from a stock item. If you want this menu item to have changeable accelerators, then pass in null for accelGroup. Next call setAccelPath() with an appropriate path for the menu item, use gtk.StockItem.StockItem.lookup() to look up the standard accelerator for the stock item, and if one is found, call gtk.AccelMap.AccelMap.addEntry() to register it.