Fix content showing in sidebar region issue #1160

[trubach]

📝 Description

Fixes #1160

The issue was that if the sidebar area was blank, no html structure was generated, and so the first content the ilw-columns tag would encounter would be the actual content, which meant it would show the content in the sidebar region.

To solve the issue, I added a <div> tag around the sidebar area, which forces the sidebar to render and puts the content in the proper place.

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✅ Peer Review Checklist

Reviewers: Please verify the following before approving.

• The pull request links to the issue it is addressing in the comment and in the "Development" section of the PR
• There is a short summary that describes how the fix is implemented
• Verifying work: Verify that the changes made are addressing the linked issue
• Accessibility: Changes that might impact accessibility are reviewed to work with keyboard navigation and screen readers
• Responsive: Layout is tested on desktop, tablet, and mobile screens
• Config changes: Any configuration updates are tested and verified using the Distribution Update import
• Security: Output is sanitized (using t(), Twig auto-escaping, etc.). No secrects included (API keys, etc.)
• Cleanliness: All debug code (ksm(), dpm(), console.log) has been removed.
• Comments: Complex logic is explained inline.
• Documentation: Any relevant documentation has been updated (this can be a separate issue if needed)

[trubach]

I'm closing this PR in favor of PR #1165 - It addresses the issue as well, but fixes a number of other issues