Swap page that allows for EFX/BNB and EFX/NFX swapping locally

[MiggySmallz]

The page just uses two iframes, 1 for PancakeSwap and 1 for DefiBox to allow members to swap directly on the DAO website. Let me know if this might be a suitable solution for allowing swapping on the site.

This resolves #170 and #171

[jeisses]

Hi Miguel, thanks for the PR!
This looks pretty good actually (the iFrame solution). Functionality wise it needs some improvements:

• The Defibox iFrame does not auto-select the correct pair form me (it fills EOS but not token to swap to).
• In Chrome the iFrames do not work for me. I'm getting a permission error for writing to local storage (see screenshot, this does not happen in Firefox).
  
  This could be related to being on localhost over http, does it work for you on Chrome?
• I think the UI for the switcher element can be more clear, I don't mind to make take a stab at this to make it more clear :)
• This PR combines the Socials tab PR, on which I also have a few questions. So it's not ready for merge straight away

[djstrikanova]

I don't think Defibox has the GET requests set up for pairs to be pre-selected to begin with. I could ask them to add that type of functionality though. It would be nice for people to just click buttons to switch between EOS/EFX and EFX/NFX.

It works for me on Brave, Chrome and Firefox.

Agree with Jesse on the buttons being kinda clunky, but that's a minor detail.

[jeisses]

The PR closed as the commits were part of #190 ; but some improvements still need to happen before we can put the page in the navigation.