0030268: Inspectors - improvements in VInspector plugin

0030268: Inspectors - improvements in VInspector plugin

# Dump for OCCT objects. It improves perfomance during the dump parsing in inspector items. A cache creating for property view values.
# ItemPresentableObject has no custom children due to the dump children count is not fixed (e.g. computed selections count)
# GetStream() has been replaced by initStream() + Stream()
# VInspector_ViewModel::FindPointers do nothing as it was poor performance of it when it parses BVH tree.