Refresh sources on new block

src/sakia/app.py

src/sakia/data/processors/sources.py

src/sakia/data/repositories/sources.py

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

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

src/sakia/services/blockchain.py

src/sakia/services/sources.py

src/sakia/services/transactions.py