Function: Ajax handler for saving the widgets order.

Function: Ajax handler for saving a widget.

Function: Ajax handler for updating a widget.

Function: Ajax handler for hidden columns.

Function: Ajax handler for updating whether to display the welcome panel.

Function: Ajax handler for retrieving menu meta boxes.

Function: Ajax handler for internal linking.

Function: Ajax handler for menu locations save.

Function: Ajax handler for saving the meta box order.

Function: Ajax handler for menu quick searching.