MSP: Performance counters for KDTree
Revert "MSP: Performance counters for KDTree"

This reverts commit 2bc541b85ac0a8b43ff71921bec5678b44a8b01f.
MSP: Track KDTree height and imbalance
MSP: Implement KDTree rebuilding
MSP: Inline two tree functions
MSP: Optimize new/delete usage in tree rebuilds