Author: raortegar
MDL-80447 core_repository: Add upload button to filepicker repository
http://git.moodle.org/gw?p=moodle.git;a=commit;h=17f87f6b936aba42058065a419bc5df196681e59
http://github.com/moodle/moodle/commit/17f87f6b936aba42058065a419bc5df196681e59
+ 5.1 en [erroruploadfailed,core_repository]
+ 5.1 en [uploadfilesdrop,core_repository]