Author: Tim Hunt
question moving MDL-21195 add missing error message strings.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=2a1516f22449399638879423cc638ffa67d1e84e
http://github.com/moodle/moodle/commit/2a1516f22449399638879423cc638ffa67d1e84e
+ 2.0 en [filecantmovefrom,core_question]
+ 2.0 en [filecantmoveto,core_question]