ParaView Plugin interface fixes
Fixes several bugs in SLAM Paraview plugin :
- Allow to apply vtkSlam filter to a PolyData : until there, we had to select LiDAR calibration to have the filter available.
- Fixes parameters display in Properties panel (especially keypoints extractor display)
- Accelerate
vtkPolyData
<->pcl::PointCloud
conversions, and add intensity field for output keypoints maps. - Update default filter params.