Display `confirmed` Bitcoin balance instead of `total`

[da-kami]

Displaying the total balance was a great idea, but it causes awkwardness because we then prominently display the maker amount being sent to the taker in the balance upon opening a channel. We cannot easily overcome this problem in the current version, so it's better to display only the confirmed balance prominently.

Additionally this causes awkwardness when we run into a channel force close, because the balance is not 0, but when trying to open a new channel we can only use 0, because our displayed balance is actually not usable.

---

@luckysori great composition, I think this is literally the only place I have to change :)

[da-kami]

bors r+

[da-kami]

bors r-

[bors[bot]]

Canceled.

[da-kami]

bors r+

[bors[bot]]

Build succeeded:

• CI
• formatting
• lint-commits