Fix failing setting tests.
Fix failing setting tests.

- Manually initialize subprovider settings, as mock widgets/components do
  not do that.
- Open context before trying to move settings from/to widget with
  context handler.

cheral/orange3,marinkaz/orange3,marinkaz/orange3,qusp/orange3,kwikadi/orange3,marinkaz/orange3,qusp/orange3,qusp/orange3,qPCR4vir/orange3,qusp/orange3,cheral/orange3,marinkaz/orange3,kwikadi/orange3,qPCR4vir/orange3,cheral/orange3,marinkaz/orange3,marinkaz/orange3,kwikadi/orange3,qPCR4vir/orange3,kwikadi/orange3,kwikadi/orange3,qPCR4vir/orange3,cheral/orange3,cheral/orange3,kwikadi/orange3,qPCR4vir/orange3,qPCR4vir/orange3,cheral/orange3