Developer credits
Git commits in Moodle 2.6.3 by Steve Clay
commit 06a76addad76b591a908d5a939ed6f312c5425d7 Author: Steve Clay <steve@mrclay.org> Date: Tue, 15 Apr 2014 06:20:08 +0800 Tag: v2.6.3 MDL-45096 block_navigation: Check for existence of the siteadminbranch before modifying it