When navigating to the same view with different params consider only doing Data "update"

[petercsiba]

Now:
Data.clear()
Data.add(allNew)

Instead:
//rewrites existing, adds new (name, value), deletes which are not in allNew
Data.update(allNew)
the "Data.update" method is non-existent. Discuss it with clean_data team if it has reason to exist.