Fix row separator in search results

[kmcginnes]

Description

The use of borders at the bottom of rows was not rendering properly sometimes. My theory is that some overlapping of elements was occurring. Instead, we use the Tailwind standard way of applying separators, using divide-y divide-{color}. This seems to render properly in all cases.

Other Changes

• Added separator in edge detail panel between edge representation and properties
• Tweaked spacing and style of neighbor list header
• Tweaked spacing of neighbor expansion options
• Added title to neighbor expansion options section
• In search results that expand to show attributes (node and edge) I allow the attribute to stretch to the right edge, only indenting on the left
• Tweaked Label to reduce font weight to baseline since medium was looking a bit heavy

Validation

Related Issues

• Resolves Separator sometimes doesn't show between each result #994

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.