Patch Preview Link module for 'Automatically populating multiple preview link entities'

[stephen-cox]

Drupal issue: https://www.drupal.org/project/preview_link/issues/3439968
Gitlab MR: https://git.drupalcode.org/project/preview_link/-/merge_requests/28

Part of #600

[stephen-cox]

Marking as draft as I need to add some tests and then we can lock the patch file to a specific commit.

[stephen-cox]

This is now ready for review.

This PR simply patches Preview Link. To see it in action you also need the plugins in Guides and Step by Steps which are here:

• Auto-populate guide preview links localgov_guides#163
• Auto-populate step-by-step preview links localgov_step_by_step#98

[stephen-cox]

There are also PRs adding populate preview link buttons to Directories (localgovdrupal/localgov_directories#376) and Subsites (localgovdrupal/localgov_subsites#146)

[stephen-cox]

@ekes @finnlewis Would be nice to get this reviewed and merge 😄

[ekes]

I'd missed this patch. Testing with step-by-step first.

My note on subsites, about levels/depth, still stands though.

[ekes]

OK so we're already similarly patching this module, so we're hooked there already.
Looked at the plugin and tests and all looks good. Also tested with step-by-step and directories manually.