Author: Adrian Greeve
MDL-30669 - blocks: Added a warning when deleting blocks that have multiple displays set.
Also added a fix to the function course_page_type_list(). It was making a call to
get_context_info_array() which will generate an error if $currentcontext is not set.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=2d931ca93b0432679551b8718ada9b1f0469a7c9
http://github.com/moodle/moodle/commit/2d931ca93b0432679551b8718ada9b1f0469a7c9
+ 2.4 en [deleteblockwarning,core_block]