[BUG] Fix OFAC filter

[yurixander]

The OFAC filter isn't working because the site used for geolocation is down.

Furthermore, the OFAC check logic can use some improvement(s), for example having a timeout if the request fails, and also saving the check result into local storage to prevent blocking the UI on every page load.

• Use a separate, ideally reliable site.
• Have a reasonable timeout for the check/request, to prevent blocking the UI if the request takes too long.
• Save the result into local storage for subsequent page loads.
• Ensure any errors from the OFAC filter are handled properly so that it does not break the site if the geolocation URL/service goes down in the future.

[drewstone]

Don't worry about this for now, let's get all logic of the flows implemented and we'll revisit this before we go live.

[drewstone]

For future use in a similar vein, we will want a generic address screening component. This would be useful to plugin different APIs that can screen an address for any compliance issues.