Author: Simey Lameze
MDL-47892 tool_monitor: disable plugin and event fields if theres subscriptions for the rule
http://git.moodle.org/gw?p=moodle.git;a=commit;h=107b55bd7444074a9e4c296338ed4272aee973e6
http://github.com/moodle/moodle/commit/107b55bd7444074a9e4c296338ed4272aee973e6
+ 2.8 en [disablefieldswarning,tool_monitor]