Fix error with dataset menu query in data_set.py
Fix error with dataset menu query in data_set.py

I'm only using g.db.execute here because using cursor is throwing an
error and I don't want to change the way this query is currently written
since I didn't write it (I believe it was initially written using
g.db.execute and whoever wrote it just forgot to put the g.db.execute,
since previously it just called "fetchall")

genenetwork/genenetwork2,genenetwork/genenetwork2,genenetwork/genenetwork2,genenetwork/genenetwork2