Notification of string changes

Author: David Monllaó
MDL-66091 report_insights: Usability improvements
- More feedback provided for the user once they click on useful/notuseful from the email.
- Replace the indicator calculations table headers for the table caption and
replace the text by just "Indicators"
- Replace "System" for the site name for insights generated at system
level
- Replace "$modelname prediction" for "$modelname" in report/insights/prediction.php
heading

MDL-66091


http://git.moodle.org/gw?p=moodle.git;a=commit;h=5e17f2faeb0a65d6b7e95346f093761468fb0ea3
http://github.com/moodle/moodle/commit/5e17f2faeb0a65d6b7e95346f093761468fb0ea3

+ 3.7 en [actionsaved,report_insights]
+ 3.7 en [indicators,report_insights]
- 3.7 en [calculatedvalue,report_insights]
- 3.7 en [indicator,report_insights]
- 3.7 en [insightprediction,report_insights]
- 3.7 en [predictioncalculations,report_insights]