Selectively hide wallet-internal transactions from transaction history.

[nuttycom]

Is your feature request related to a problem? Please describe.

It's somewhat confusing to have wallet-internal transactions, such as shielding transactions and the initial transaction of a ZIP 320 transaction pair displayed as normal transactions in the transaction history.

Describe the solution you'd like

Wallet-internal transactions could be elided from the transaction history by default. An advanced setting could allow the user to request that they be included in the transaction history view.