Add currency symbols where appropriate

[jkup]

• Submitted a ticket for my issue if one did not already exist.
• Used Github auto-closing keywords in the commit message.
• Added/updated tests for this change (for new code or code which already has tests).
• Ran git rebase -i to squash commits (if needed).

Fix #3533

Auditors @bsclifton @cezaraugusto

Test Plan:

1. Go to Preferences > Payments
2. Check the payment amount, the current balance, and your payment history and make sure they all have $ for currency.

[bsclifton]

How is this.props.ledgerData.get('currency') determined? I'm guessing it's based on the IP?

@jkup can you screenshot the places where currency is updated? I'm also curious how the formatting looks for other currency

[jkup]

@bsclifton yep it's based on the IP. I added a screenshot of what this looks like for USD but I'm a little hesitant to ship this ticket because after talking with @mrose17 it turns out faking the currency is difficult to do.

I suppose my only real worry is that we support some currency that doesn't exist in this package's currency map (https://github.com/bengourley/currency-symbol-map/blob/master/map.js) so it will default to USD instead. Thoughts?

[mrose17]

the list is fairly comprehensive, so i'm no worried about it.

we do not have plans to turn on additional currencies right now, so i don't think this is a priority.

i would do the PR and then mark the issue closed.

[cezaraugusto]

++ lgtm

[bsclifton]

Thanks for the update! Looks good 😄

[luixxiul]

Note: npm i is required to fix the error

Uncaught TypeError: getSymbolFromCurrency is not a function{TypeError: getSymbolFromCurrency is not a function

[jkup]

@luixxiul yep this is how adding npm packages works

[bradleyrichter]

@cezaraugusto This PR is useful but needs to be corrected ASAP to show the ISO 4217 currency code (3 letters) instead of the symbol.

[bsclifton]

This was reverted; removing milestone