[Forwardport] Fix issue 19052- Position order showing before the text box

[davidverholen]

Original Pull Request

magento#19056

Description (*)

You will find the position order showing before the text box as well when we can find the same value in textbox as well.

Fixed Issues (if relevant)

1. Position order showing before the text box magento/magento2#19052: Position order showing before the text box

Manual testing scenarios (*)

1. Catalog > Category > Choose any category > Go to Product in category tab > Assign products.
2. Product position order before textbox.

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)