Fix double or more spaces in previous records in Sales_Order_Grids tables

[addison74]

When this change #578 is implemented by an OM upgrade all initial records in the bill_name and shipping_name columns will remain in their original form with a double space between the names. My opinion that an sql upgrade should be created to modify these records too not only the php files.

I did it quickly directly in the database with the help of the SQL script bellow and I didn't limit myself to just two spaces between the names, there can be even more. In this way not only the recordings after the upgrade are found correctly, but all of them!

UPDATE `sales_flat_creditmemo_grid` 
SET `billing_name`= REGEXP_REPLACE(billing_name, '[[:space:]]+', ' ');

UPDATE `sales_flat_invoice_grid` 
SET `billing_name`= REGEXP_REPLACE(billing_name, '[[:space:]]+', ' ');

UPDATE `sales_flat_order_grid` 
SET `shipping_name`= REGEXP_REPLACE(shipping_name, '[[:space:]]+', ' ');

UPDATE `sales_flat_order_grid` 
SET `billing_name`= REGEXP_REPLACE(billing_name, '[[:space:]]+', ' ');

UPDATE `sales_flat_shipment_grid` 
SET `shipping_name`= REGEXP_REPLACE(shipping_name, '[[:space:]]+', ' ');