Feature/sandy clothing items

[drewhoener]

Adds a UI element that shows if sandy has a clothing item that can only be gotten via character creation, useful so you don't have to check every day.
Adds a toggle to show just the rare items, as well as one that shows any clothing item she sells.

Fixes #316

[drewhoener]

@tqdv @Annosz should be ready for review

[Zamiell]

Drew, you can probably merge this now since you seem to be the primary maintainer?