Fix for Bug 3372 - OPAC Reading History sorting breaks limit

Fix for Bug 3372 - OPAC Reading History sorting breaks limit

Some other cosmetic and functional changes:

- "Show all/Show 50" links had been styled as tabs at some time
in the past. A CSS change somewhere broke this. Reimplementing it.

- Moving sort control to a <select> similar to the one used on
search results. Since javascript-based table sorting from the
table header is used elsewhere in the OPAC I felt the <select>
method better reflected the behavior of this re-sort.

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