Squashed 'blocks/dashboard/' changes from 6af29ad..dc8c14d

dc8c14d fix export break

git-subtree-dir: blocks/dashboard
git-subtree-split: dc8c14dcba5612fe4b2592354c89834836d3ce1b
Merge commit '6e616d4f061c534be1a1b8649d02749dd606d75f' into test-MOODLE_25_STABLE
Mise à jour de moodle-block_dashboard dans MOODLE_25_STABLE mercredi 5 mars 2014, 23:05:27 (UTC+0100)