Price Conflicts with Tax Class ID in Product Overview

[bennyborn]

When assigning a price to a product that coincidentally matches the ID of a tax class, the product overview in the backend incorrectly attempts to use the fully rendered price as an ID for foreign key resolution on the price field.

Steps to Reproduce

1. Set a product price to 3.00.
2. Ensure a tax class exists with the ID 3 (e.g., Standard 19% (ID 3)).
3. In the backend product overview, the system executes an incorrect query:

SELECT name AS value FROM tl_iso_tax_class WHERE id = '3.00 (Standard 19%)' LIMIT 0,1

4. In the product overview the price will now be missing and the (most likely) incorrect tax class will be shown instead:

This is due to a fix from PR #2341 where DC_ProductData tries to resolve the foreignKey set on the price field in tl_iso_products.
See 0fa4462#diff-89b47cb2c0f1f23a7fb8bfbdf7bb203e94fa8cef702e9ec3afca305fe1cc4a02R1616-R1629