Block Grid Layout Stylesheet

[nielslyngsoe]

Adding stylesheets for rendering block grid layouts. + correcting link beneath picker.

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.