Tests and continuous integration: Fixed issues and updated CI configuration #1653

Job	Run time
Python 3.8 on ubuntu-20.04 PyQt5	9m 48s
Python 3.11 on ubuntu-latest PyQt6	9m 7s
Python 3.12 on ubuntu-latest PySide6	8m 7s
Python 3.10 on macos-13 PyQt5	15m 13s
Python 3.12 on macos-13 PyQt6	13m 5s
Python 3.9 on macos-13 PySide6	11m 41s
Python 3.9 on windows-latest PyQt5	11m 3s
Python 3.12 on windows-latest PyQt6	9m 13s
Python 3.10 on windows-latest PySide6	4m 13s
	1h 31m 30s

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