Transactions views

src/sakia/data/processors/identities.py

src/sakia/data/processors/transactions.py

src/sakia/data/repositories/transactions.py

src/sakia/gui/navigation/model.py

src/sakia/gui/navigation/txhistory/controller.py

src/sakia/gui/navigation/txhistory/model.py

src/sakia/gui/navigation/txhistory/table_model.py

src/sakia/gui/navigation/txhistory/txhistory.ui

src/sakia/gui/navigation/txhistory/view.py

src/sakia/services/blockchain.py

src/sakia/services/identities.py

src/sakia/services/transactions.py