PrsDim → SelectMgr Relation

File in src/PrsDim	Includes file in src/SelectMgr
PrsDim_Dimension.hxx	SelectMgr_EntityOwner.hxx
PrsDim_DimensionOwner.hxx	SelectMgr_EntityOwner.hxx
PrsDim_IdenticRelation.hxx	SelectMgr_Selection.hxx