Fix amount field

[markettes]

This PR attempts to solve #8038

Change Description

Description of change / link to associated issue.

Steps to Test

Steps for reviewers to follow to test the change.

Pull Request Checklist

Testing

• Your PR passes all CI checks.
• Tests covering the positive and negative (error paths) are included.
• Bug fixes contain tests triggering the bug to prevent regressions.

Code Style and Documentation

• The change obeys the Code Documentation and Commenting guidelines, and lines wrap at 80.
• Commits follow the Ideal Git Commit Structure.
• Any new logging statements use an appropriate subsystem and logging level.
• There is a change description in the release notes, or [skip ci] in the commit message for small changes.

📝 Please see our Contribution Guidelines for further guidance.

[hieblmi]

🎉Thank you very much for picking this up @marekttes. The PR is neat and clean.
I only have a question about the MinConfs check in the server.

[guggero]

Thanks for the PR. I think the CLI needs a couple of changes, otherwise the code looks okay.
Can you please make sure you check the pull request check list? The commits should be squashed into two, one for the RPC changes and one for the CLI. And a change log entry for the 0.18 release should be added to docs/release-notes/release-notes-v0.18.md.

[ellemouton]

@markettes - see the guidelines for how to model commit titles. For your commits, it would probably be along the lines of: lnrpc: add MinConfs to WalletBalanceRequest, lncli: show balance for sweepall and finally docs: release notes update for 0.18.0.

Please also remove the merge commit 🙏 instead, rebase on master before pushing

[markettes]

All done @ellemouton 😄

[guggero]

The linter is failing because of a line that is longer than 80 characters (you need to count tabs as 8 spaces, best to set up your IDE that way to make it easier).

[markettes]

Ready now @guggero, sorry, my bad!

[hieblmi]

Thanks again for working on this! I think we can remove an else statement to improve readability.

[guggero]

Two more nits, otherwise looks, thanks!