Extension Error Page

[Gudahtt]

The MetaMask extension should have a generic error page, to present a friendlier interface in the case an unexpected error occurs.

A first attempt at this has been made here: MetaMask/metamask-extension#7889
However that error page isn't especially nice-looking, and it doesn't allow the user to take any further actions.

The most important function of the error page is to inform the user that something is wrong. Here are a few things we could consider adding to the error page though:

• Let the user know that we have received an error report
• Allow the user to download state logs
• Allow the user to submit a crash report
• Allow the user to refresh the page (which sometimes will at least temporarily fix the issue)
• Display debugging information