TStiKalmanTrackNode: Added new data member flag copied from original StiKalmanTrackNode
StiScanHistContainer: Added histogram with energy losses in cartesian coordinates. Helps to see the volumes in xy projection
StiScanHistContainer: Let user set logarithmic scale on each axis independently, and use this feature for some of the histograms
StiScanHistContainer: Removed outdated histograms with eloss, number of track nodes/steps per bin, etc. Some of them already have been replaced with Profile3D histograms