Trade protocol domain improvements

[chimp1984]

To fix the issues with missing delayed payout tx I added a automatic re-send of the relevant message and changed the order of the tasks so that the deposit tx is not published if the message was not ACKed from the peer.

Another major change is to remove all automated handling of failed trades and show instead a warn icon in the open trades list. The user can then click on a button to move the trade to failed trades. A popup gives detail info about the failure and instructions. From failed trades there is also a button to move the trade back to pending trades.
The trade details window shows now always all 4 trade txs and if one is missing it sets the text color to red and shows a warn icon.

UPDATE:
This PR also removes the refresh button for resending a message. It does instead an automated resend from the senders side until it gets an ACK message back, signaling that the message arrived.

Beside that there have been fixed various edge case bugs.

This PR comes also with some major refactorings. The trade protocol got a new fluent interface so it is more readable.
Example:

 public void onPaymentStarted(ResultHandler resultHandler, ErrorMessageHandler errorMessageHandler) {
        BuyerEvent event = BuyerEvent.PAYMENT_SENT;
        expect(phase(Trade.Phase.DEPOSIT_CONFIRMED)
                .with(event)
                .preCondition(notDisputed()))
                .setup(tasks(ApplyFilter.class,
                        getVerifyPeersFeePaymentClass(),
                        BuyerSignPayoutTx.class,
                        BuyerSetupPayoutTxListener.class,
                        BuyerSendCounterCurrencyTransferStartedMessage.class)
                        .using(new TradeTaskRunner(trade,
                                () -> {
                                    resultHandler.handleResult();
                                    handleTaskRunnerSuccess(event);
                                },
                                (errorMessage) -> {
                                    errorMessageHandler.handleErrorMessage(errorMessage);
                                    handleTaskRunnerFault(event, errorMessage);
                                })))
                .run(() -> trade.setState(Trade.State.BUYER_CONFIRMED_IN_UI_FIAT_PAYMENT_INITIATED))
                .executeTasks();
    }

For testing error case there is a debug tool which let any selected task fail. With cmd+ z and devMode enabled it opens.
As the PR has tons of code changes it will require proper testing of all trade protocol and dispute related use cases, specially cases with the other peer being offline.
I have tested quite a lot but have not tested backward compatibility yet. I am not aware that there should be any issue, but it should be tested as well.
Review will be a bit challenging as there are so many changes, but I think a proper testing should be enough.

Here are some screenshots:

[chimp1984]

@m52go Thanks!

[sqrrm]

@chimp1984 It seems all my comments and concerns have been addressed. Once conflicts are resolved I think we can merge this. Do you want more testing done before merging?

[chimp1984]

@sqrrm Yes please get it merged asap...

[sqrrm]

ACK