All externallib_test, generator_test and filter_test classes:
- Namespaced with component[\level2-API]
- Moved to level2-API subdirectory when required.
- Fixed incorrect use statements with leading backslash.
- Changed code to point to global scope when needed.
- Fix some relative paths and comments here and there.
- All them passing individually.
- Complete runs passing too.
Special mention to tests under testing/tests:
1) The core_testing component doesn't exist.
2) But testing/tests are allowed because there is a suite pointing to it (phpunit.xml).
3) So, the only possible namespace for them is "core".
4) And to avoid problems with other core testcases (under lib/tests)
they have been renamed to have testing_xxxx as prefix.
Finally, also modified calendar/tests/events/events_test.php because it uses
some renamed (core_calendar_externallib_testcase => \core_calendar\externallib_test)
classes.
So we are putting them under a standard PHP_MAJOR_VERSION < 8 condition.
Also, added TODO comments to remember to delete that block of code when
php80 becomes the minimum required versions in the future (Moodle 4.3?).
When possible, an issue has been created upstream, else a comment in
readme_moodle files has been added.
Finally, when the keys being freed were class or object attributes, also
nullify them (but when the calls were part of destructor methods).
Changes since the original implementation in e55abd71 mean that
relative date filtering (by last/next day/week, etc) is now based
on the actual current time, rather than the start or end of the
current time unit.
The "Grades were set for X items "message will be displayed on the
same screen, to safe one click to users and make it more consistent
with other similar actions in Moodle.
Added homeurl ($PAGE->navigation->action) to config helpers added to mustache templates.
Changed boost and classic themes to use config.homeurl on the brand logo link.
Updated global_navigation class to set properties to correct values when
get_home_page() returns HOMEPAGE_MYCOURSES.
