[2.3-develop] Order grid - Sort by Purchase Date Desc by default

[ihor-sviziev]

(cherry picked from commit ad3c18f) #11911

Description

As a customer I expect to see new orders at the top of the grid, however during migration from M1 to M2 - order number length changed, as result new orders are NOT located at the top of grid.

In order to fix this issue for all cases - we're changing default sorting order to "Purchase Date" desc.

As we discussed with @okorshenko in #10185 (comment) sorting order grid by Increment is not good idea. I'm proposing change default sorting from increment_id column to created_at.

Sorting issue happens only in following cases:

• Orders were migrated from Magento 1
• Used prefix/suffix for order number
• Customized order ID generation
• Etc.

NOTE: Order grid sorting saves in ui_bookmark table, so before testing need to execute following SQL:

TRUNCATE table ui_bookmark;

Fixed Issues (if relevant)

Manual testing scenarios

1. Create three orders as example 1000000001, 1000000002 and 1000000003
2. Go to order grid (sorting is correct)
   
3. Change 1000000001 order number to 100000001 (remove one 0 in the center) to emulate that order was migrated from M1 & Go to Order grid: (last created order became NOT first)
   
4. Create new Order & go to order grid (latest order is not at the top)
   

Contribution checklist

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/integration tests (if applicable)
• All automated tests passed successfully (all builds on Travis CI are green)