[editor] Pre-commit cleanup

beat/editor/test/test_assetmodel.py

beat/editor/test/test_databaseeditor.py

beat/editor/test/test_delegates.py

beat/editor/test/test_plotterparameterseditor.py

beat/editor/test/test_toolchaineditor.py

beat/editor/widgets/algorithmeditor.py

beat/editor/widgets/databaseeditor.py

beat/editor/widgets/dataformateditor.py

beat/editor/widgets/experimenteditor.py

beat/editor/widgets/parameterwidget.py

beat/editor/widgets/plottereditor.py

beat/editor/widgets/plotterparameterseditor.py

beat/editor/widgets/toolchaineditor.py

beat/editor/widgets/toolchainscene.py