Display ENS Avatar if builder has an ENS. Continue using QRPunkBlockie if builder doesn't have ENS or if their ENS avatar isn't set.
Will affect the following components:
- Account component used to show logged in user in the Header
- Address component that is used in Activity page, Builders page and Vote Builds page
- BuilderProfileCard that is used in the dynamic route for builders / builders' portfolio dashboard
I pretty much have this working already.