T3711
In general, fiat prices can be more "intuitive." However in practice this is not often the case for Agora spot prices, which may be something like $0.000017 USD per token.
Add a toggle switch to make it easy to switch.
The `Switch` component is updated to typescript while we are at it. Needed to do this to troubleshoot behavior of "hit switch on one component, toggles it on a different one". This ended up being related to Switch needing a unique name. Important React caveat to keep in mind when rendering 100s of components...especially when they all can spend money.