Author: Rossiani Wijaya
MDL-30816 choice module: fixed accessibility for responses table and make it easier for screenreader to read it
http://git.moodle.org/gw?p=moodle.git;a=commit;h=34e0b4a71e7b27a3786d23248cb1a3010fc6aeed
http://github.com/moodle/moodle/commit/34e0b4a71e7b27a3786d23248cb1a3010fc6aeed
+ 2.3 en [numberofuserinpercentage,mod_choice]
+ 2.3 en [responsesresultgraphheader,mod_choice]
+ 2.3 en [userchoosethisoption,mod_choice]