Add ENS name to gnosis signer modal

What's included in this pr + description

Replace truncated address with ENS name where possible on Gnosis signer modals

Motivation & Context

Ran into case where Kate DM'd me asking who from Station's multisig approved a proposal, highlighting need to have a human-readable version

Screenshots

Outstanding issues

A better solution is to add an AccountMediaRow object to use user-defined profile pictures and names, but this proved difficult because we don't generate accounts for signers automatically so I was running into issues with non-existent accounts and side effects of that.

0xStation / proposer

Add ENS name to gnosis signer modal #795

What's included in this pr + description

Motivation & Context

Screenshots

Outstanding issues