Fix vtkGlyph3DRepresentation in client-server mode.

When the input connection to port 1 changed, in client-server mode, the
vtkGlyph3DRepresentation failed to deliver data for the same as the
GlyphMultiBlockMaker didn't execute. This forces the execution.

ParaViewCore/ClientServerCore/Rendering/vtkGlyph3DRepresentation.cxx

@@ -180,6 +180,12 @@ int vtkGlyph3DRepresentation::RequestData(
 
   this->GlyphMultiBlockMaker->SetInputConnection(glyphSourcePort);
 
+  // This is needed as for some reason when the input connection is changed,
+  // in client-server mode, the GlyphMultiBlockMaker decides not to reexecute on
+  // the client. That's throws of all logic to determine if data needs to be
+  // delivered etc.
+  this->GlyphMultiBlockMaker->Modified();
+
   this->GlyphCacheKeeper->SetCachingEnabled(this->GetUseCache());
   this->GlyphCacheKeeper->SetCacheTime(this->GetCacheKey());
   this->GlyphCacheKeeper->Update();