Specify recipients in MINT and REDEEM functions

[superduck35]

Is your feature request related to a problem? Please describe.

A sub-set users wish to MINT or REDEEM to a recipient address, rather than having it returned to the sender.

Describe the solution you'd like

Implement a non-intrusive way for users to specify and select a recipient in the MINT and REDEEM pages.
Given that it is only for a sub set of users, it should not clog the page up, but be more of an advanced feature.

This should allow any MINT or REDEEM to be redirected to a given recipient. The function already exists on the mStable-contracts to do this.

Bonus points

• Support ENS names

Additional context

This should:

• be in keeping with the theme of the rest of the app
• have sufficient validation to avoid user error

Feel free to reach out to the team for any further information.