How to stop loading order history at "Add Order" Page?

[KiwiRider]

Hi,

 

I'm still using 1.5.6.2 due to problem on auto-update (just break my shop front somehow).

 

When I "add order" on back office then select a customer, Prestashop loads all the cart and order history.

 

How can I stop load this at all? We takes order by phone and put it on manually. Now it takes a while to load up for add a new order because we only use few customer accounts but used them daily basis.

 

I'm really appreciate any help.

 

Where is the code should I disable it?

 

Cheers

 

KiwiRider