Run wallet event listeners on bitcoinj network threads
Present dialog on insufficient funds when sending coins
Clean up amount validation
Fix focus handling in 'send coins' dialog
Labs: Put BIP70 payment request on NFC tag and be prepared to read it
Labs: Put BIP70 payment request into QR-code and be prepared to read it
Labs: Use BIP70 PaymentMessage/PaymentACK messages in Bluetooth offline transaction protocol if payment was initiated by a PaymentRequest message
[WIP] Open BIP70 payment requests from content-URIs, e.g. from e-mail attachments
[WIP] Handle HTTP/HTTPS payment URLs
When payment was initiated by one of the payment request variants, prevent changing the "to address"