Adding Argentine Spanish locale file

Dev

no more breakpoints, just max width #183

PNG -> SVG 

refactor transaction details modal into expanding panel

improving classnames for transaction details items

fix too thin font-weight in currency-panel

fix issue w/ responsiveness due to media querie

device-width is deprecated and only works in chrome it seems. reworked to use regular min/max-width queries for both scss & react-responsive. submitted a ticket to react-responsive to fix

Noticed duplicate code 

```
  if (tokenAddresses.addresses.filter(([ symbol ]) => symbol === label).length) {
    return;
  }
```

* Retry deadline if undefined

* Remove console logs

Improve scroll performance of Token List

Fixes https://github.com/Uniswap/uniswap-frontend/issues/139

add Trust deeplink

* Add contextual info to Remove Liquidity page

* Create ContextualInfo component and refactor pages

* Add contextual info to remove liq and refactor

* Add modalClass attribute to ContextualInfo

* Mirror add liquidity text

Normalize remove liquidity exchange rate