Create submenu for gradual selection criterion before analyzing point cloud

[andyroo]

Currently the gradual selection tool defaults to the "Reprojection Error" criterion when opened. With a 16 million point cloud it takes me 2 minutes for the "analyzing point cloud" dialog to complete, then I have to select what I want (reconstruction uncertainty) and wait another 77 seconds for that analysis to complete. If I could select the criterion before the analysis started it would save me time. Also as in the post I +1'd it would be great if this were exposed in batch/python API

[RnFstMapper]

I second the request for a gradual selection submenu (or at least don't start analysis automatically when the tool is opened). The short term workaround is to immediately cancel the analysis progress once the gradual selection window opens and then select the desired criteria and re-analyze. This can save time for very large point clouds.