Notification of string changes

Author: Safat Shahin
MDL-72074 qbank_usage: Add usage plugin to core
This implementation will introduce the usage plugin
which shows qhich quizes are using this question,
number of attmpts and other information.

Co-Authored-By: Safat Shahin <safatshahin@catalyst-au.net>
Co-Authored-By: Matt Porritt <mattp@catalyst-au.net>


http://git.moodle.org/gw?p=moodle.git;a=commit;h=8f06aa01dc28926798c947ee44fb5e8461644867
http://github.com/moodle/moodle/commit/8f06aa01dc28926798c947ee44fb5e8461644867

+ 4.0 en [pluginname,qbank_usage]
+ 4.0 en [privacy:metadata,qbank_usage]
+ 4.0 en [questionusage,qbank_usage]
+ 4.0 en [usageheader,qbank_usage]
+ 4.0 en [modulename,qbank_usage]
+ 4.0 en [coursename,qbank_usage]
+ 4.0 en [versions,qbank_usage]
+ 4.0 en [state,qbank_usage]
+ 4.0 en [attempts,qbank_usage]
+ 4.0 en [questionusageversion,qbank_usage]