reduce technical debt: use static attribute for final stream, use
isEmpty on Collection
Reduce code complexity
BS-6939: Support import of diagram with empty lanesets, support better
handling of position for diagram with several pools that doesn't contain
lanes
BS-7035: redirect URl parameter has been modified, we shoul dnot provide
http://<ip>:<port> part
Merge branch '6.2.x' of https://github.com/bonitasoft/bonita-studio into 6.2.x