Create connection cleanup

[kmcginnes]

Description

• Add vertical padding to list item content
• Allow flex items to take full width in connection detail pane
• Move existing config deconstruction logic in to CreateConnection modal code
• Rename form properties to match config connection property names
• Remove unnecessary mapping after rename
• Add separate boolean for fetch timeout enabled
  • This fixes an issue where if the user deletes all text in the input, the check box automatically unchecks and the input disappears

Validation

• Verified old config values carry over properly
• Verified new and old connections are created/updated properly

Related Issues

• Resolves [Bug] Long URLs are have no vertical padding in connection list #292

Check List

• I confirm that my contribution is made under the terms of the Apache 2.0
  license.
• I have run pnpm checks to ensure code compiles and meets standards.
• I have run pnpm test to check if all tests are passing.
• I have covered new added functionality with unit tests if necessary.
• I have added an entry in the Changelog.md.