Under scratchbook, users can make datasets too big to see resize control

Steps to reproduce:

- Making a dataset quite large
- Viewing a second
- The first's controls are pushed off the page

Start by reproducing the issue in the scratchbook: create a large dataset and open a second view. Inspect the scratchbook UI responsible for dataset controls and confirm that the resize control remains accessible when the page becomes too large.

Written by the indexing model from the issue text.