Memo/note/comment for transactions

**What problem are you trying to solve?**
When I look at my tx list, remembering what's what is very confusing/hard/impossible

**Describe the solution you'd like**
On each transaction prompts, a note/memo field you can save, so when you look through the list, you know what's what

Start by tracing the transaction prompts and transaction list mentioned in the issue to understand how transaction data is displayed and persisted. Done means each transaction has a saveable note or memo that is shown when reviewing the transaction list.

Written by the indexing model from the issue text.