fix draft state module manipulation for rails3

test plan (rails3; draft state enabled):
 - on the modules page of a course
 * create a new module
 * add items to the module
 * edit the module
 * edit the items in the module
 * refresh the page, all modifications should remain

fixes CNVS-11924

Change-Id: I273d38880d5d1736ce667895ef26a29df546d539
Reviewed-on: https://gerrit.instructure.com/32137
Tested-by: Jenkins <jenkins@instructure.com>
Reviewed-by: Jeremy Stanley <jeremy@instructure.com>
Product-Review: Jeremy Stanley <jeremy@instructure.com>
QA-Review: Nathan Rogowski <nathan@instructure.com>