Trailhead icon size tweaks.
Trailhead icon size tweaks.

mgraesser/trailsy,remory08/trailsy,trevorackerman/trailsy,remory08/trailsy,vinh3928/trailsy,vinh3928/trailsy,CodeForBoulder/trailsy,JamesGould123/trailsy,mbarrenecheajr/trailsy,mgraesser/trailsy,JamesGould123/trailsy,trevorackerman/trailsy,mbarrenecheajr/trailsy,CodeForBoulder/trailsy