Show details of what you sign

[anxolin]

Description
When you sign an order using EIP-712, users will sign a JSON blob. Some wallets might present it nicer, like a table of fields and values, however this is not very user readable.

This is what they see:

Proposal
Show more details on what you are signing. Ideally, it would be nice to show the user in the modal how the parameters (in human readable way) maps to that JSON blob they sign.