Tests and continuous integration: Fixed issues and updated CI configuration #1655

Job	Run time
Python 3.8 on ubuntu-20.04 PyQt5	10m 5s
Python 3.8 on ubuntu-20.04 PyQt5	10m 5s
Python 3.11 on ubuntu-latest PyQt6	8m 50s
Python 3.11 on ubuntu-latest PyQt6	8m 50s
Python 3.12 on ubuntu-latest PySide6	7m 48s
Python 3.12 on ubuntu-latest PySide6	7m 48s
Python 3.10 on macos-13 PyQt5	15m 12s
Python 3.10 on macos-13 PyQt5	15m 12s
Python 3.12 on macos-13 PyQt6	17m 52s
Python 3.12 on macos-13 PyQt6	17m 52s
Python 3.9 on macos-13 PySide6	19m 1s
Python 3.9 on macos-13 PySide6	19m 1s
Python 3.9 on windows-latest PyQt5	8m 49s
Python 3.9 on windows-latest PyQt5	8m 49s
Python 3.12 on windows-latest PyQt6	9m 21s
Python 3.12 on windows-latest PyQt6	9m 21s
Python 3.10 on windows-latest PySide6	5m 2s
Python 3.10 on windows-latest PySide6	8m 32s
	3h 27m 30s

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