fix: adjust generate certificate page layout

[mas-who]

Done

• Fixed styling for the generate certificate page

QA

1. Run the LXD-UI:
   • On the demo server via the link posted by @webteam-app below. This is only available for PRs created by collaborators of the repo. Ask @mas-who or @edlerd for access.
   • With a local copy of this branch, build and run as described in the docs.
2. Perform the following QA steps:
   • N/A

Screenshots

[webteam-app]

Demo

Jenkins

demos.haus

[edlerd]

Thanks for the style fix, one more tiny observation on spacing below.

[edlerd]

perfect, thanks for the fixes.

[mas-who]

perfect, thanks for the fixes.

@edlerd Thanks for spotting the issue! :)