Bug 10768 - Improve the interface related to itemBarcodeFallbackSearch

Bug 10768 - Improve the interface related to itemBarcodeFallbackSearch

When the itemBarcodeFallbackSearch syspref is on, the wording in the
interface should reflect that you can enter a barcode OR a keyword.
Additionally, in the results of a keyword search the "Fast cataloging"
link should be more descriptive. This patch fixes these issues.

Test plan:

0) [PREREQUISITES] Ensure you have a Fast Add ('FA') framework defined,
   and that your itemBarcodeFallbackSearch syspref is set to 'Enable'.
1) Go to Circulation -> Check out, search for a patron, then select a
   patron to Check out. Notice how the text above the textbox reads
   "Enter item barcode:".
2) Type something generic (not a barcode) in the textbox so that you'll
   get at least one item as a result. Notice how the text in the yellow
   warning box reads "The barcode was not found: <terms> Fast cataloging".
3) Apply the patch.
4) Repeat step 1), now the text above the textbox should read
   "Enter item barcode or keyword:".
5) Repeat step 2), now the text in the yellow warning box should read
   "The barcode was not found: <terms> Add record using fast cataloging".

Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Katrin Fischer  <katrin.fischer@bsz-bw.de>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
(cherry picked from commit 6fc03f1968f9e405d745b854577c953106fdbdfe)
Signed-off-by: Frédéric Demians <f.demians@tamil.fr>
(cherry picked from commit 68c21aabe99fb12ef3987a142f5cc0389422a7bd)
Signed-off-by: Julian Maurice <julian.maurice@biblibre.com>