Author: Shamim Rezaie
MDL-46317 admin: convert userquota config from text to filesize widget
http://git.moodle.org/gw?p=moodle.git;a=commit;h=e945b883fa743c6aa4f25b7439faaa339adb00e4
http://github.com/moodle/moodle/commit/e945b883fa743c6aa4f25b7439faaa339adb00e4
+ 3.8 en [userquota_desc,core_admin]