Significant string changes:
* hidegrader_help,mod_assign - note about setting having no effect on
comments box
* configdefaultrequestcategory, configenablecourserequests,
configlockrequestcategory, lockrequestcategory, core_admin - clearer
explanation
* configenablecompletion,core_completion - including reason for setting
activity completion conditions
* emailstop,core - clearer wording
* setuplink_desc,tool_mobile - including where the app download page
link is displayed and leaving the setting empty
- Split model::predict in parts
- JS promises updated according to eslint-plugin-promise
- New API methods replacing direct DB queries
- Reduce insights nav link display cost
- Increase time limit as well as memory for big processes
- Move prediction action event to core
- Dataset write locking and others
- Refine last time range end time
- Removed dodgy splitting method id to int
- Replace admin_setting_predictor output_html overwrite for write_setting overwrite
- New APIs for access control
- Discard invalid samples also during prediction
