Formatting

- Added missing ; to "nbsp"
- Remove filtering from checkbox items in controller
- Added null check to checkboxes in controller
- Fixed function naming to avoid 404
- Removed escaping from fixed urls
- Removed esc() wrapping around site_url() which already returns escaped urls.
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Internal Server Error - Gitea: Git with a cup of tea
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Gitea Version: 1.28.0+dev-477-g8b6ad49a5f