EventTransferSentSuccess should contain amount and target

[konradkonrad]

Problem Definition

Currently EventTransferSentSuccess events are only informative, if the user keeps an out-of-band book over all initiated transfers and their respective identifiers. I.e.

    {
        "block_number": 1666812,
        "event_type": "EventTransferSentSuccess",
        "identifier": 1266537366290712202
    }

does not allow to learn anything about the details of the transfer.

Solution

EventTransferSentSuccess should mirror EventTransferReceivedSuccess and contain the fields

• amount
• target
  as well.

Tasklist

• Add amount and target to EventTransferSentSuccess
• Add tests for correct values for these fields
• Adjust the API endpoint, specs & docs to include these
• Adjust the webui implementation to make use of these

[czepluch]

Closed with #1043