Update note list components to use CSS variables for colors

[sandymcfadden]

Fix

This is a continuation of moving to CSS variables for colors within the app.
This updates the note list and related components

• Note List
• Note Cell
• No Notes

It also fixes a small issue with the tag suggestions, but more will be required for that component in future PRs.
It also fixes an issue with the search highlighting in the note list where a background color was being set on matches when it shouldn't be.

Test

• Smoke test in light and dark mode
• Switch to All notes and ensure components look the same
• Switch to a tag and ensure components look the same
• Switch to the trash and ensure components look the same
• Perform a search and ensure components look the same

Release

• Updated the Note List, Note Cell, and No Notes, components to use CSS variables for colors

[codebykat]

Looks great! I tested in the browser, light and dark modes, and didn't see any style differences between this branch and production.