Imports: changed scipy.signal.gaussian, replaced with scipy.signal.windows.gaussian #1475

Job	Run time
Python 3.8 on ubuntu-20.04 PyQt5 sdist	7m 13s
Python 3.10 on macos-latest PyQt5 wheel	7m 29s
Python 3.8 on ubuntu-latest PySide6 sdist	8m 47s
Python 3.9 on macos-latest PySide6 wheel	15m 21s
Python 3.11 on ubuntu-latest PyQt6 wheel	8m 30s
Python 3.10 on macos-latest PyQt6 wheel	9m 43s
Python 3.9 on windows-latest No GUI wheel	5m 10s
	1h 2m 13s

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