Git commits in Moodle 3.0.4 by Mark Johnson

commit 5bd06806e2ae8ecc8882ba5dfe75e7eddc41eafb
Author: Mark Johnson <mark.johnson@open.ac.uk>
Date:   Tue, 29 Mar 2016 18:43:26 +0800
Tag:    v3.0.4

MDL-53007 block_navigation: Set width of item text to prevent overflow