- Rebased off the Settings PR #24790 as some testing functionality from there was necessary
- Removed dead code from editor.py and codeeditor_tab_view
- Added qt_assertions_helper package, which provides Qt-specific assertions,
such as a way to check the number of connections on a QObject
- Moved test_multifileinterpreter to be QT5 only
- Moved mock_codeeditor to be in utils.testing.mocks