LP1527756: Patron summary should scroll separately from patron search results

LP1527756: Patron summary should scroll separately from patron search results

To test:
1) Without this patch, do a patron search with a lot of results in a
browser window that is not very tall on a laptop or desktop computer.
2) Click on a search result.
3) Scroll down.  Note that the patron summary on the left side of the
screen also scrolls down at the same time.
4) Apply this commit.
5) Repeat steps 1-3.  Note that the patron summary has a separate
scrollbar and does not scroll along with the right side of the screen.
6) Confirm that the behavior you saw in step 5 is true across all of the
patron record tabs (e.g. Check Out, Items Out).

Signed-off-by: Jane Sandberg <sandbej@linnbenton.edu>