fix(ui): strip trailing zeros from currency values

Do not display insignificant trailing zero decimal places when
displaying BTC currency amounts.

The additional trailing zeros make numbers unnecessarily long and
harder to read.

app/components/Value/Value.js

@@ -10,7 +10,7 @@ const Value = ({ value, currency, currentTicker, fiatTicker }) => {
   if (currency === 'fiat') {
     price = currentTicker[fiatTicker].last
   }
-  return <i>{convert('sats', currency, value, price)}</i>
+  return <i>{Number(convert('sats', currency, value, price))}</i>
 }
 
 Value.propTypes = {