Bug 5502 - Patron card category search field should be menu

When searching for patrons to add to a patron card creator batch there
is a text input field for submitting a patron category. This should be a
dropdown menu. This patch corrects it.

To test, go to Tools -> Patron card creator and click "New batch."
 - Click the "Add item(s)" button.
 - Confirm that in the Patron search pop-up window there is a dropdown
   menu populated with existing patron categories.
 - Confirm that searches limited by patron category return correct
   results.
 - Confirm that the correct patron category is automatically preselected
   after performing a search limited by category.
 - Confirm that reordering the table of search results works correctly.

Signed-off-by: Aleisha <aleishaamohia@hotmail.com>

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>
Bug 12600: remove duplicate use statement from code

A use C4::Charset was added deep in the body of the code
we have already imported it at the top of the file
(the by convention normal place) As use is executed at compile time
specifying it in the code body does not serve a
useful purpose and detracts from the readability of an already
overly complex subroutine.
Remove the superfluous statement
also removed the tabs introduced to the surrounding lines
by the same commit

Signed-off-by: Bernardo Gonzalez Kriegel <bgkriegel@gmail.com>
Search still works, no errors.

Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>