Author: Jason Fowler
MDL-44216 Atto: Reversing the indent outdent buttons
http://git.moodle.org/gw?p=moodle.git;a=commit;h=e7109b59494634f0806156b74530f617819109c5
http://github.com/moodle/moodle/commit/e7109b59494634f0806156b74530f617819109c5
+ 2.7 en [indent,atto_indent]
+ 2.7 en [outdent,atto_indent]