FEATURE: Multiple Virtual Idea Dice Set (VIDS) support

[foo-dogsquared]

I guess the plural of that is VIDSs?

Now that a VIDS set is feature-complete (at least in my vision), the next milestone is the support for multiple VIDS in the app.

Currently the app can only hold one VIDS at a time and you can interact with multiple VIDS by importing/exporting it. This is a tedious (and manual which means mostly error-prone) process.

There's also making sure that it doesn't break previously generated data. Also, the way how the app render these means that there will be a slight change with the data structure (most likely).

Can't forget about the UI (especially this). It could be implemented as a simple sidebar, being a simple list of VIDS currently stored on your device.