Notification of string changes

Author: Sam Hemelryk
MDL-43033 cache: added a warning icon for mappings
We now show a warning icon with an explanatory alt if the user
has mapped a store as a mode default that doesn't not fulfill the
requirements of every known definition.


http://git.moodle.org/gw?p=moodle.git;a=commit;h=e6175024e612b915aa8bb67b06aaabdd082500e6
http://github.com/moodle/moodle/commit/e6175024e612b915aa8bb67b06aaabdd082500e6

+ 2.6 en [inadequatestoreformapping,core_cache]