Override responsive divider orientation for medium screens with col-m…

[huwshimi]

Done

Override responsive divider orientation for medium screens with col-medium- applied.

Fixes: #4438.

QA

• Open the default divider demo
• Check that at large screens you see vertical dividers but medium and small screens show horizontal dividers.
• Open the responsive columns demo
• Check that at large and medium screens you see vertical dividers but small screens show horizontal dividers.

Check if PR is ready for release

If this PR contains Vanilla SCSS code changes, it should contain the following changes to make sure it's ready for the release:

• PR should have one of the following labels to automatically categorise it in release notes:
  • Feature 🎁, Breaking Change 💣, Bug 🐛, Documentation 📝, Maintenance 🔨.
• Vanilla version in package.json should be updated relative to the most recent release, following semver convention:
  • if CSS class names are not changed it can be bugfix relesase (x.x.X)
  • if CSS class names are changed/added/removed it should be minor version (x.X.0)
  • see the wiki for more details
• Any changes to component class names (new patterns, variants, removed or added features) should be listed on the what's new page.
• Documentation side navigation should be updated with the relevant labels.

Screenshots

These screenshots have col-medium-2 applied to the columns.

Large:

Medium:

Small:

[webteam-app]

Demo starting at https://vanilla-framework-4594.demos.haus

[bartaz]

LGTM, thanks!