Fixes custom block view for block list

[warrenbuckley]

Prep ready for hackathon work
Touched the two files to look at and left a comment to the issue for my own reminder tomorrow
umbraco/Umbraco-CMS#17316

---

Description

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Chore (minor updates related to the tooling or maintenance of the repository, does not impact compiled assets)

Motivation and context

How to test?

Screenshots (if appropriate)

Checklist

• If my change requires a change to the documentation, I have updated the documentation in this pull request.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.

[nielslyngsoe]

This might already be solved here, so great help would be to confirm if this PR works:
#2515

And then it needs to be replicated to grid... :-)

[rickbutterfield]

Yep I think my PR fixes this issue! From what I can see it has already been resolved for Block Grid, based on comments in the code

[warrenbuckley]

Closing as Rick beat me to it
#2515