feat: ability to select jar when unlocking fidelity bond

When "unlocking" the funds of an expired Fidelity Bond, it is automatically placed in Jar A. It would be nice for if users had the ability to select a different destination jar.

Originally posted by @dergigi in https://github.com/joinmarket-webui/jam/issues/556#issuecomment-1348186319

It is now changed to skip the jar selection and default to Jar A automatically - the code to select a Jar is still present for now and can be enabled with a flag - hope that is okay (in case it is decided to enable this flow or provide a toggle).

If we want to keep it in, we could add an Unlock Options to the Unlock modal, just like we have on Receive?

Add this "fold" ...

Screenshot 2022-12-13 at 11-53-26 Jam for JoinMarket

...to this screen:

Screenshot 2022-12-13 at 11-54-49 Jam for JoinMarket

Would still default to A (unless you go through the trouble of changing it) and would hide the complexity nicely, while still providing the option.

joinmarket-webui / jam

feat: ability to select jar when unlocking fidelity bond #574