* Parallelize cloud generation in export/view clouds dialog and rtabmap-export
* Simplified NodeExportData by holding Signature directly. Added --threads option (default max cores) for CLI and UI.
* Parallelized texturing phase the same way than cloud generation
* Fixed not cancelable (right away) cloud generation in UI
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Co-authored-by: matlabbe <matlabbe@gmail.com>
* Use BFS instead of A* for proximity graph-depth filtering
* refactored name of the function, added performance test comparison
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Co-authored-by: matlabbe <matlabbe@gmail.com>