Bug
DT-200 Fix sub-grid disappearing issue
Enhancement
DT-197 Set the building models in BEI and occupancy clamp to the ground
Story
DT-190 upgrade cesium to v18.0
DT-187 migrate vfbv FIRS analyser (frontend/backend) into DT as a new panel.
Task
DT-209 Fix the PointCloud in DT