Build 473 is released.

 1. Fixed the defect: when a single invalid multiframe file is present in the subfolder - the whole DICOM load failed without diagnostics. Now problematic file names are shown to the User who has an option to proceed without them.

2. Fixed defect in sorting calling contract in DICOM Tree record sorting (RawTime and RawTimeSerNumber).

3. Fixed several memory leaks in DicomMakeTree.cpp

4. DicomMakeTree.cpp : C++17 compliance: removed binary operators in parallel sorting.