Bug 10404: add previous/next browsing to staff client

Although previous/next browsing was added for searches in the OPAC
in 2011, the staff client has been without any sort of search browsing.
Until now. This patch is an all-singing, all-dancing, all-compatible
implementation of search browsing that will work across multiple
browser tabs and on any browser since IE7 (though the staff client
layout is broken on IE7).

To test:
1) Perform a search that will bring up multiple results.
2) View one of the results.
3) Use the Previous and Next links to browse along the search results.
4) Use the "Return to results" button to check that you end up at the
   correct page of results, even if you page through more than 20
   records.

Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Galen Charlton <gmc@esilibrary.com>
Bug 10404: tweak style of staff client previous/next links

This patch slightly modifies the styles of the previous/next links in a
way that I think is simpler and clearer.

To test, apply the patch and clear your browser cache if necessary.
Perform a search in the staff client, click any result, and look at the
prevous/next links.

Signed-off-by: Magnus Enger <magnus@enger.priv.no>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Galen Charlton <gmc@esilibrary.com>
Bug 10643: fix inappropriate uses of $sth->finish() in C4::ClassSource.pm

This patch gets rid of finish() and replace prepare_cached by prepare.

From the man page

finish()
Indicate that no more data will be fetched from this statement handle
before it is either executed again or destroyed.
You almost certainly do not need to call this method.

Adding calls to "finish" after loop that fetches all rows is a common
mistake, don't do it, it can mask genuine problems like uncaught fetch errors.

Signed-off-by: Srdjan <srdjan@catalyst.net.nz>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Galen Charlton <gmc@esilibrary.com>