Profile Unload

[micahalcorn]

When a user has added provisional profile data (name, attestations, etc) and attempts to leave without publishing to the blockchain, a modal should appear warning the user and suggesting that she first publishes the identity. This should apply not only to reloading or exiting the page but also React route changes. It might be possible to borrow some logic from DApp1. 🤷‍♂️

[micahalcorn]

Additionally, the name, description, and picture are not retained while the attestations are. There should be a way to clear the locally-stored verifications, including the repaired profile attributes.

(moved to #2241)