Fix codemirror scrollbar on editor page (#1948)
Fix codemirror scrollbar on editor page (#1948)

Codemirror needs an explicit height setting.
parthea/datalab,googledatalab/datalab,googledatalab/datalab,parthea/datalab,googledatalab/datalab,googledatalab/datalab,parthea/datalab,googledatalab/datalab,parthea/datalab,parthea/datalab,googledatalab/datalab,parthea/datalab