fix: always add memo to transaction input if truthy

[dated]

Summary

https://app.clickup.com/t/n995yg

Checklist

• [ ] My changes look good in both light AND dark mode
• [ ] The change is not hardcoded to a single network, but has multi-asset in mind
• [ ] I checked my changes for obvious issues, debug statements and commented code
• [ ] Documentation (if necessary)
• [ ] Tests (if necessary)
• [x] Ready to be merged