- Format all files with black
- Update tox.ini flake8 arguments to be compatible
- Add black to requirements-extra.txt
- Reduce ignored flake8 rules and fix a few violations
- Update qt/preferences_dialog.py to resize based on layout with fixed
sizing constraints
- Remove _setupUi from qt/se/preferences_dialog.py and just use the
parent class's function
- Remove unused imports from qt/se/preferences_dialog.py