Forms: fix sidebar spacing

[simison]

Fixes #41124

Proposed changes:

• Fix spacing -issues in sidebar

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• Add forms block
• See field's settings from sidebar

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[enejb]

@simison I looked into why we were not picking up the default styles it turned out it was because for some reason we were adding an empty div to the controls. Which made the styles behave not as expected.

I fixed it an the styles are more what we would expect them to be.

Feel free to merge the PR if you agree with the way forward :)

[simison]

Nice! It looks good. If this works well feel free to merge, otherwise I'll do more testing tomorrow and deploy.