Dashboard: Create Portfolio components

[chrisleee]

The design for portfolio overview and what pieces of information should show up has not been figured out yet.

• [ ] Container: Contains Item components. Will most likely have state.
• [ ] Item:

Choose appropriate component names, such as Portfolio, and (...more to come).

Mockup

Reference images

(found on StockBrokers.com)

(found on Coinbase.com)