Bug 10755 - Add "Keyword as Phrase" to staff client advanced search indexes

Bug 10755 - Add "Keyword as Phrase" to staff client advanced search indexes

This patch adds a "Keyword as Phrase" index to the search options in
the staff client.

Test Plan:

1) Go to the Advanced Search in the staff client and click on the "Keyword"
drop-down list.
2) Note that there is only a "Keyword" not a "Keyword as Phrase" option
3) Apply the patch
4) Reload the Advanced Search
5) Note that there is now a "Keyword as Phrase" option as well

If you want to test the functionality...it will depend on your catalogue
data.

Basically, a phrase search will allow you to find "Keyword Adjacent To
Keyword" rather than a more scattershot search that finds the keywords
regardless of their position to each other.

Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Template change is correct, and in my tests the searching behavior was
correctly modified: Using "keyword as phrase" returned only results
where the terms were adjacent.

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Passes koha-qa.pl, trivial patch with no possible side effects.

Signed-off-by: Galen Charlton <gmc@esilibrary.com>