Add func to check if any preproc steps
Add func to check if any preproc steps

In order to avoid user confusion, a prompt is added to the
'preprocessing options' step of a new analysis if there are no
tokenization steps allowed for the given analysis, and there are no
cleanuptypes assigned to the given analysis.

rigatoni/linguine-node,rigatoni/linguine-node,Pastafarians/linguine-node,Pastafarians/linguine-node