Fix undefined names #964

Job	Run time
Python 3.13 on windows-latest PySide6 wheel (for frozen Windows binaries)	5m 56s
Python 3.12 on ubuntu-latest PySide6 wheel	3m 20s
Python 3.9 on ubuntu-latest (Minimum Versions)	5m 44s
Python 3.12 on macos-latest PySide6 wheel (for frozen MacOS binaries)	4m 22s
Python 3.13 on ubuntu-latest PyQt5 wheel	5m 31s
Python 3.14 on macos-latest PySide6 wheel	4m 35s
Python 3.14 on windows-latest PyQt6 wheel	5m 23s
Python 3.10 on ubuntu-latest PySide6 wheel	3m 13s
Python 3.11 on ubuntu-latest PyQt6 wheel	2m 59s
Python 3.13 on macos-latest PyQt6 wheel	5m 6s
	46m 9s

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