Add fulltext/keyword search field for product admin grid

[josefbehr]

Description

This adds a keyword search field (like on sales_order_grid) to catalog_product_grid (product_listing)

Manual testing scenarios

1. Log into the backend
2. Go to Catalog -> Products
3. Notice the key word search field
4. Enter arbitrary search terms occurring in product attributes
5. Apply and filter grid to only show matching products

Fixes issues

1. Quick Search feature in Admin is not working properly when choosing in Products #5785

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)

[maghamed]

Grid Search is not a responsibility of CatalogSearch module, as CatalogSearch is responsible just for Front-End search.
Grid Search is the responsibility of Catalog module, so fix should be placed there

Thus, you can change directly product_listing.xml

[josefbehr]

@maghamed
Can do, but what about the dependency on the Collection from CatalogSearch

[maghamed]

@josefbehr I looked through the CatalogSearch code and found that there is already code responsible for Backend search

Magento\CatalogSearch\Model\Search\Catalog

so, let's leave your fix in CatalogSearch, because you right, for now, we have the dependency on this Collection

[maghamed]

please use private instead of protected

[maghamed]

please change to UnusedFormalParam

[maghamed]

BTW, could you please test that general Admin Search works correctly.
For now, in the upper right corner, we have a search box. When Admin starts typing there a search phrase - dropdown box appears which provides an ability to search in "Products", "Customers", "Orders", "Pages".

Search in Products doesn't work because for now there is no Search on Product grid.
Let's check that searching from the Admin Search will make a correct redirect to the Product grid with applying Search phrase as a filter.

[josefbehr]

@maghamed
Admin Search does (still) not appear to be working for Products. But neither does it so for Orders. What would I have to change to make it workable?

[maghamed]

hey @josefbehr. For me search for Orders works as expected
http://b2b.dev.magento.com/builds/20170616035016/backend/sales/order/index/?search=Katia

I thought that Search for Products will work after your changes. If not, need to double check that.

All that global search does is redirects on Order/Customer/Page/Product grid with ?search GET parameter and whether Grid supports search - it applies the filter.

Fixes applied according to review

[Ctucker9233]

@magento-team Can this be backported to 2.2?