Author: raortegar
MDL-80447 core_repository: Add upload button to filepicker repository
http://git.moodle.org/gw?p=moodle.git;a=commit;h=be840bc26fcbbaee24ca559bda21fcebfa3c14bd
http://github.com/moodle/moodle/commit/be840bc26fcbbaee24ca559bda21fcebfa3c14bd
+ 5.0 en [erroruploadfailed,core_repository]
+ 5.0 en [uploadfilesdrop,core_repository]