Curiosa and import options

This is amazing! I started using it last week and it's great.

As a suggestion from the Sorcery perspective I would like to see one of two functions:
- either a sync to the curiosa website for our collection
- or when we import a full list downloaded from curiosa, I wouldn't have to first delete my entire inventory and then bulk upload (as far as I understand it add the number of cards rather than edit the deltas)