Fix for Bug 4416, renew all and return all buttons too close together

Fix for Bug 4416, renew all and return all buttons too close together

This patch removes the "return all" button altogether. Returning all items
is a step which one wouldn't take lightly or even regularly. Since the
interface has a means of selecting all checkboxes in the "Check in" column,
removing the "Return all" button wouldn't eliminate the means of doing so, it
would just require more deliberation.

Signed-off-by: Galen Charlton <gmcharlt@gmail.com>