Chain Swap Over/Underpayment Dialogue

[kilrau]

In case user over or underpays in the funding payment of a chain swap, we'd want to let user decide if to

• accept & continue with the new amount (depends on https://github.com/BoltzExchange/boltz-backend/issues/579)
• fail swap & refund

If sent amount is out of our min/max it should switch to the refund page directly.