0023106: BRepMesh_IncrementalMesh returns wrong status

0023106: BRepMesh_IncrementalMesh returns wrong status

Fix compilation errors on Linux platform

Squeeze compilation warnings on Linux

Fix regressions

Back RemoveFaceAttribute for further reasons

Fix retrieving of polygon by index

Fix applying of location

Test case for issue CR23106

Fix memory leak regression 'test bugs vis bug79' occurred due to incorrect memory cleaning of inherited objects by MMgtRaw::Free through BRepMesh_IEdgeTool;

Replace BRepMesh_PDiscretRoot by pure pointer to BRepMesh_DiscretRoot;

Fix IVtkOCC_ShapeMesher.