Add a filter woocommerce_admin_terms_metabox_datalimit to change the data-limit value for the attributes term box

[lsinger]

Submission Review Guidelines:

• I have followed the WooCommerce Contributing Guidelines and the WordPress Coding Standards.
• I have checked to ensure there aren't other open Pull Requests for the same update/change.
• I have reviewed my code for security best practices.
• Following the above guidelines will result in quick merges and clear and detailed feedback when appropriate.

Changes proposed in this Pull Request:

This is a copy of #41411. Based on the discussion I preferred to take the PR over to get the CI checks sorted. All props to @Babylon1999.

Closes #37548.

The current attribute term list in the product editor imposes a limitation of 50 terms creating inconvenience for merchants with attributes exceeding this limit. Consequently, they are unable to search for terms from the drop-down menu.

This proposed solution allows for a flexible adjustment of the term limit by introducing a filter, woocommerce_admin_terms_metabox_datalimit, which will allow to modify the data-limit variable. This approach eliminates the need to edit the plugin files directly, providing a more streamlined and customizable solution.

How to test the changes in this Pull Request:

Using the WooCommerce Testing Instructions Guide, include your detailed testing instructions:

1. Add a product with 60 terms
2. If you check the drop-down list in All Product > Product > Attributes, it will be limited to 50
3. To increase the limit to 60 or more, add the following in the functions.php file:

function example_callback() {
    return 60;
}
add_filter( 'woocommerce_admin_terms_metabox_datalimit', 'example_callback' );

Testing instructions and PR description taken over from the original PR.

Changelog entry

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Significance

• Patch
• Minor
• Major

Type

• Fix - Fixes an existing bug
• Add - Adds functionality
• Update - Update existing functionality
• Dev - Development related task
• Tweak - A minor adjustment to the codebase
• Performance - Address performance issues
• Enhancement - Improvement to existing functionality

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Comment

[github-actions]

Test Results Summary

Commit SHA: a433b05

Test 🧪	Passed ✅	Failed 🚨	Broken 🚧	Skipped ⏭️	Unknown ❔	Total 📊	Duration ⏱️
API Tests	259	0	0	2	0	261	0m 37s
E2E Tests	80	0	0	271	0	351	7m 18s

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To view the full API test report, click here.
To view the full E2E test report, click here.
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[github-actions]

Hi @jorgeatorres, @coreymckrill, @nathanss,

Apart from reviewing the code changes, please make sure to review the testing instructions as well.

You can follow this guide to find out what good testing instructions should look like:
https://github.com/woocommerce/woocommerce/wiki/Writing-high-quality-testing-instructions