When a end-to-end test failed which would've marked an error message as
expected later in the test, seeing the teardown message about an unexpected
error being logged is really confusing.
This is a bit tricky since the test will actually run, but be marked as
skipped. The problem is we can't raise a pytest.skip.Exception during a test,
or it'll show up as an exception in a virtual Qt method.
Still this is better than nothing.
- qtbot.waitSignal with raising=True is the default this way, so we remove the
raising=True.
- qtbot.waitSignal with raising=False stay untouched
- Some qtbot.waitSignal without raising had one added (because we don't want it
to raise)
- Some qtbot.waitSignal without raising actually should've raised, which they
do now.
