fix(purchases): Hide "2/locked" as appropriate
fix(purchases): Correct hair path

Fixes https://github.com/HabitRPG/habitrpg/issues/4312.
fix(avatar): Correct "Facial Hair" text

Adjusts the text style of "Facial Hair" header in Avatar shop to follow the same scheme as Hair. Before, the text was less header-like than elements under it.
Merge pull request #4378 from SabreCat/purchases

Hide "2/locked" as appropriate