Fix saveCSV behaviour
In this MR, we made some modifications on applogic to make the user available to save one or several frames from a lidar with the File/SaveAs/SaveCSV
context menu.
We uncomment the rotateCSVFile
function as it is repaired, so now XYZ coordinates appear at the first 3 columns in the exported CSV file.
Some modifications are related to the upgrade to python 3.
@melanie.carriere PTAL