make the order of the taxon nodes editable
for drag & drop it is now possible to move a taxonnode as a child node of the classification
dnd support in taxon navigator for Taxonnodes protected regarding user permissions - #4055 (action enablement adapts to the users granted authorities)
merged model adaptions to cdmlib 3.2.4 from campanula branch
It is now possible to drag a taxon onto another classification, previously it one was only able to drag onto taxon nodes