Notification of string changes

Author: Jun Pataleta
MDL-86701 customfield: Better naming of custom field action buttons
Include the category and field names for accessible names of the delete
and action buttons to help assistive technology users better understand
the buttons' purpose.


http://git.moodle.org/gw?p=moodle.git;a=commit;h=fa4f770b87378b96e57b5eefd442a7daf844b534
http://github.com/moodle/moodle/commit/fa4f770b87378b96e57b5eefd442a7daf844b534

+ 4.5 en [deletecategory,core_customfield]
+ 4.5 en [deletefield,core_customfield]
+ 4.5 en [editfield,core_customfield]