Author: Mark Nelson
MDL-58907 block_myoverview: added setting to select default tab
http://git.moodle.org/gw?p=moodle.git;a=commit;h=11a24a823b280d547d0f7f689424bdd12ba04474
http://github.com/moodle/moodle/commit/11a24a823b280d547d0f7f689424bdd12ba04474
+ 3.3 en [defaulttab,block_myoverview]
+ 3.3 en [defaulttab_desc,block_myoverview]