Bug 10171: Add a search box include on advanced search and item search pages

Bug 10171: Add a search box include on advanced search and item search pages

This patch creates a new file: adv-search.inc. This search include has
no catalog search (as it makes no sense to have the catalog search tab
on the advanced search page).
The item search page uses home-search.inc (with catalog search) as the
catalog search is different to the item search.

To test:
1) Go to Search (advanced search)
2) Confirm search header is there with no catalog search tab and works
   as expected
3) Go to item search
4) Confirm search header is there with catalog search tab and works as
   expected

Sponsored-by: Catalyst IT
Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Tested together with follow up patch, works as expected.
Signed-off-by: Marc Véron <veron@veron.ch>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>