This removes the three-month pseudo block from along the side of the
main calendar, and deprecates relevant files/methods which will no
longer be in use.

The new get_safe_orderby() and get_safe_orderby_multiple() methods
provide a centralised safe way for user submitted sorting values to be
incorporated into SQL ORDER BY. They do this by removing the need for
user submitted data to pass in any SQL and not allowing arbitrary
column values, instead using string keys which map to a predefined
list of allowed sortable columns.

David Matamoros authored Nov 05, 2021 and Paul Holden committed Nov 11, 2021

Co-authored-by: Paul Holden <paulh@moodle.com>

Use card view settings to show a 'card view' for custom reports in small devices

- new 'set_columns_attributes' method created to add column attributes included in every column cell.
- new 'get_row_cells_html' method created from 'get_row_html', so it can be overriden individually.

- Create a new 'settings' column in reportbuilder_report table and provide an API to manage it
- Add new card view settings to custom reports

- rename 'system_report' template to 'report'
- view.php now uses 'report' template

Co-authored-by: Paul Holden <paulh@moodle.com>

Merge branch 'MDL-71902-add-site-level-settings-enforcement-for-browsersecurity-settings' of https://github.com/keevan/moodle

This API now accepts an optional parameter 'searchvalue' to search the events