Bug 10936: (prog theme) remove duplicate 'Standard number' option in Advanced search

Bug 10936: (prog theme) remove duplicate 'Standard number' option in Advanced search

TEST PLAN
---------
1) Set opacthemes system preference to prog
2) In OPAC, click 'Advanced search'
3) Click 'More options'
4) Check the Keywords dropdown for duplicate 'Standard number'
5) Apply patch
6) Refresh page, and make sure 'More options' is clicked still
7) Check the Keywords dropdown for duplicate 'Standard number'
   -- it's not this time

Signed-off-by: Bernardo Gonzalez Kriegel <bgkriegel@gmail.com>
Work as described on prog theme, no more duplicate.
No koha-qa errors

Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Signed-off-by: Galen Charlton <gmc@esilibrary.com>