Merge 2.4 into master

* #2571 from MartinChodakowski:fix-old-python-doc-typos
* #2575 from rold2007:Bugfix_1437
* #2579 from maksqwe:test_operations_fix
* #2591 from Nerei:viz_cloud_shading_support
* #2599 from maksqwe:test_calibration_2.4
* #2603 from maksqwe:unused_fix_2.4