feat: add button to auto-balance LN channels

[uwla]

Solves #831.

NOTE: work in progress, implementation not ready yet.

Done

• Add new action in network store to autobalance channels.
• Add button component that dispatch that action

To do

• Make it work
• Add tests

Help needed here.

Trying to auto-balance the channel I got the error Insufficient balance, but this should not happen since the source has more than enough funds to pay the target and that can be confirmed by logging the amounts in the console.

I decided to open the PR anyway, so I can get help with the bug.