smarter label renaming if only a single UTXO for each address

[AndySchroder]

When changing a label for an address, if there is only a single UTXO associated with that address, also rename that UTXO to have the same label.

Similarly, if we rename the UTXO and there are no other UTXO for the address, rename the address label as well.

Similarly, if the address or UTXO that we are renaming is only part of a transaction where no other UTXO or addresses in the wallet are used, the transaction should also be renamed.

[craigraw]

This is (in general) how it already works. There are some restrictions when labelling UTXOs to avoid many (recursive) changes on wallets with high address reuse.

[AndySchroder]

Are you able to test these scenarios? I'm struggling to get them all to consistently work right even with a single UTXO associated with and address.

#1600 is a related issue. It seems when I rename a transaction, other things get renamed, but not always in the right way.

[craigraw]

Can you provide a reproducible series of steps to demonstrate what you mean?