This hopefully fixes this warning on Windows:
QWindowsWindow::setGeometryDp: Unable to set geometry 113x16+192+124 on
QWidgetWindow/'ProgressClassWindow'. Resulting geometry: 124x16+192+124
(frame: 8, 31, 8, 8, custom margin: 0, 0, 0, 0, minimum size: 0x0, maximum
size: 16777215x16777215).
This replaces various other constructs:
- The default_config fixture - this means the config values used by
test_progress.py are set explicitly and the (rather complex) default config
is mocked out.
- stubs.ConfigStub which was created by the tests manually before.