Keep current selection for Related, Up-sells, Cross-sells, Associated grids

[luigifab]

Description

Go to Catalog > Products and choose any product.
For Related, Up-sells, Cross-sells, Associated (for grouped products) grids.

• Uncheck all products, then reset filter or filter or sort or change the page, after AJAX all products are unchecked.
• Check some products, then reset filter or filter or sort or change the page, after AJAX selected products are checked.

Try Sales / Order grid, this is the same thing.
This is an extract of #1379.

OpenMage 20.0.17 / PHP 8.0.25

Contribution checklist

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All automated tests passed successfully (all builds are green)

[fballiano]

I'm not sure I understand the current behaviour and the wanted one

[kiatng]

I think it's bug: backend product page > Up-Sells tab > grid

1. select a product on page 1
2. go to page 2 and back to page 1
3. the selected product is unchecked

However, the fix doesn't seem to work for me.

[luigifab]

I tested your scenario, with the current PR, it works for me.

[addison74]

This is a nasty bug. I was able to reproduce it easily. If you use Magento Sample Pack, just edit the product Silver Desert Necklace, go to Up-sells, select in the grid Any and press the [Search] button. You will get 30 product pages in the grid. Select one product at a time on the first 4 pages then go back without saving the product. All selections not made no longer exist, they are gone.

The funny part is that the interface notices the change and displays the diskette icon for saving next to Up-sells.

[addison74]

I applied this PR and the issue is solved. All checkmarks remain on each page in the grid.

[kiatng]

Tested.

[fballiano]

merged and cherrypicked to v20