Author: Juan Leyva
MDL-57408 tool_mobile: New setting for renaming app strings
http://git.moodle.org/gw?p=moodle.git;a=commit;h=af1b6043a1816fcf3bfea2b8c56f1afb2e9ac43c
http://github.com/moodle/moodle/commit/af1b6043a1816fcf3bfea2b8c56f1afb2e9ac43c
+ 3.3 en [customlangstrings,tool_mobile]
+ 3.3 en [customlangstrings_desc,tool_mobile]