Implement Transaction Detail Screen

[apbendi]

Issue 9

Screen shown when user clicks on a row form the Transaction Detail screen

Additional functionality on screen:

9.2. Link to DAGviz Explorer for the tx. (urls is get /transaction/id/:txid. Endpoint should be configurable via config file or settings).
9.3. URL for from/to address (/transactions/address/:address)
9.4. URL for blocks (/block/:blockhash)
9.5. Show at the bottom a list of transaction entries from the log