Bug 23529: Narrow scope of changed

Bug 23529: Narrow scope of changed

Whilst working on something else, it came to light that the previous fix
in bug 23229 was waaaaay too heavy handed and basically kills all ILL
related JS :( This is obviously a big problem, this patch fixes that.

The main problem is that all the ILL related JS is in a single file,
which isn't ideal as bits of it are used on different pages. Ideally,
we'd refactor it out into more manageable chunks which can be included
as required. Until such a time, this patch will do, it just prevents the
"get all requests" AJAX request unless you're on the ILL list page.

Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>