Sketch links

[Izzy-Snyder]

Progress toward #3550

Changes: Added link underlines to sketches, collections, and about pages. Link underlines become thicker upon hover.

I have verified that this pull request:

• has no linting errors (npm run lint)
• has no test errors (npm run test)
• is from a uniquely-named feature branch and is up to date with the develop branch.
• is descriptively named and links to an issue number, i.e. Fixes #123

[raclim]

Thanks so much for your work on this!

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Will add screenshots here below for reference!

About Page:

Collection List:

Sketch List:

[raclim]

I think the changes here look good to me! Thanks again!