Fix representations to not dependend of order of setting input and adding to view
This issue was created automatically from an original Mantis Issue. Further discussion may take place here.
Currently representations require that the input is set before adding the representation to the view. Also the representation objects are not created until the input is set. This restriction can be easily lifted by setting up the pipeline and strategies only after the representation has been added to a view and has an input, without any restrictions on when the objects are actually created.
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