0024521: Visualization - automatic back face culling is not turned on for Solids packed into compound

StdPrs_ToolShadedShape::IsClosed():
- return true if shape is closed Solid (NOT just free closed Shell)
- accept compound of closed Solids as well
- ignore Solids with incomplete triangulation

TKOpenGl, automatically disable back face culling when:
- clipping/capping planes are in effect
- for translucent objects

Update bug23227 test case (now back faces are clipped).

OpenGl_Workspace::AspectFace() - disable culling in case of hatched style

src/OpenGl/OpenGl_Workspace.cxx

@@ -166,6 +166,7 @@ OpenGl_Workspace::OpenGl_Workspace (const Handle(OpenGl_Display)& theDisplay,
   TextParam_applied (NULL),
   ViewMatrix_applied (&myDefaultMatrix),
   StructureMatrix_applied (&myDefaultMatrix),
+  myCullingMode (TelCullUndefined),
   myModelViewMatrix (myDefaultMatrix),
   PolygonOffset_applied (NULL)
 {
@@ -269,6 +270,7 @@ void OpenGl_Workspace::ResetAppliedAspect()
   TextParam_set         = &myDefaultTextParam;
   TextParam_applied     = NULL;
   PolygonOffset_applied = NULL;
+  myCullingMode         = TelCullUndefined;
 
   AspectLine(Standard_True);
   AspectFace(Standard_True);