fix: convert multi payment amount

[alfonsobries]

Summary

https://app.clickup.com/t/86dvrv22k

Checklist

• I checked my UI changes against the design and there are no notable differences
• I checked my UI changes for any responsiveness issues
• I checked my UI changes in light AND dark mode
• I checked my (code) changes for obvious issues, debug statements and commented code
• I opened a corresponding card on Clickup for any remaining TODOs in my code
• I added a short description on how to test this PR (if necessary)
• Documentation (if necessary)
• Tests (if necessary)
• Ready to be merged

[alexbarnsley]

@alfonsobries there seems to be a failing test which (i suspect) is related to your changes

[alfonsobries]

@alexbarnsley fixed

[alexbarnsley]

TL;DR recipient amount needs to be shown in wei I think