Fix search bar hover color

[kmcginnes]

Description

Removes the background color on the results count text. This makes the background clear which allows the hover color to come through.

Validation

1. Open search panel to get results
2. Close search panel
3. See non-hover result count in search bar
4. Hover over to see hover state

Normal

Hover

Related Issues

Fixes #291

Check List

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