#summary Replaced instances of DragDrop::IsTypeMatch with FDragDropEvent::GetOperationAs()
#note Please change any instances of DragDrop::IsTypeMatch for the templated FDragDropEvent::GetOperationAs<>() or FDragDropOperation::IsOfType<>() where necessary
#proj Editor
#branch UE4
#reviewedby Nick.Atamas
[CL 2042222 by Andrew Rodham in Main branch]
#proj UE4
#branch UE4
#summary Improved the error reporting when renaming a layer
#reviewedby Thomas.Sarkanen, Max.Preussner
[CL 2038541 by Jamie Dale in Main branch]