Author: Zig Tan
MDL-60726 assign: Fix assign submission confirmation alignment
http://git.moodle.org/gw?p=moodle.git;a=commit;h=f13c851d055571cb47d37078b0efe171a222ff64
http://github.com/moodle/moodle/commit/f13c851d055571cb47d37078b0efe171a222ff64
+ 3.4 en [confirmsubmissionheading,mod_assign]