feat: show progress during rescan

[theborakompanioni]

See https://github.com/JoinMarket-Org/joinmarket-clientserver/pull/1696. See also: https://github.com/joinmarket-webui/jam/issues/743

As a user, I want to have a progress on the rescan operation in order to estimate the time till a rescan completes. Rescan can take quite some time depending on the hardware and it would be nice to have more information.

Instead of "Rescanning in progress", show "Rescanning in progress (21%)"..

[editwentyone]

"21% – Rescanning in Progress…" maybe?

[r3yc0n1c]

I'd like to work on this.

[theborakompanioni]

I'd like to work on this.

I am afraid this is currently not possible as this data is not returned from the api: https://github.com/JoinMarket-Org/joinmarket-clientserver/pull/1696

[18c83fd3-25ea-4ed9-8205-2abeff9b3883]

with Commit 5fd2c99 to joinmarket this should be possible now

[18c83fd3-25ea-4ed9-8205-2abeff9b3883]

updated PR