Author: Bas Brands
MDL-63612 core_admin: make course card colours configurable
http://git.moodle.org/gw?p=moodle.git;a=commit;h=c5b2ab478635e69f9a7ca2f157b9f709b6ec7077
http://github.com/moodle/moodle/commit/c5b2ab478635e69f9a7ca2f157b9f709b6ec7077
+ 3.8 en [coursecolor,core_admin]
+ 3.8 en [coursecolorheading_desc,core_admin]
+ 3.8 en [coursecolorsettings,core_admin]