Keep a list of requested payments in the Receive tab so that a user can
recall previously created requests after closing their windows.
Currently this list is not stored between bitcoin-qt sessions. This can
be implemented later, but it is not clear where it should be stored as
I don't think it belongs in the wallet (maybe in QSettings?)
- remove 2 unneeded windowTitle attributes, which bloat our translations
- cleanup some unneeded .cpp/.h includes and class usages
- use a more generic string for clearing sendcoinsdialog and
requestpaymentdialog
- edit 2 strings in BitcoinGUI and replace "edit" with "show" as this
seems more clear in the context where it is used
- We no longer have an address book, but "address lists", update message
accordingly
- Add tooltips here and there
- Clarify text on buttons
- add Copy Address button to receive request dialog
