LP1803584: Fix Clear button in template editor

LP1803584: Fix Clear button in template editor

There are multiple controllers in staff/cat/volcopy/ and
2 of them have a clearWorking() function. The template
editor controller is referencing $scope.MultiMap[] which
will never exist in the template editor, while the actual
item editor controller clearWorking() does not reference
$scope.MultiMap[], meaning that clearing multiple items
at once would not work as expected. This branch clears
up this confusion.

Signed-off-by: Jason Boyer <jboyer@library.in.gov>