MDL-40343 forum: indent less when mobile, nested

Changes the indenting of forum replies to be relative to the width of
the parent container, so the indent decreases as threads get nested
deeper. Also reduces the indent size automatically for smaller screen
sizes.
MDL-46219 assignment: delete files when resetting assign activities
MDL-45636 course_rest: changed modcontext to coursecontext
MDL-47466 calendar: use get_in_or_equal() in function calendar_get_events to fix problem with ORA-01795
MDL-47569 backup: Escape section summary for XML

This was causing the parsing of the XML
to fail because things like & were not
escaped.
MDL-47569 backup: Do not close questions tag if never opened

This can happen when restoring quizzes that
do not have any questions.
MDL-33939 gradingform_guide: use correct max grade for scales.
MDL-47466 calendar: fixed error ORA-01795 in calendar_get_events
MDL-36987 auth_manual: fix config for field locking

Thanks to Sergey for the patch
MDL-29873 Lesson: Essays not shown on grade page with SQL server
MDL-47755 badges: Fix internal message output

Signed-off-by: Yuliya Bozhko <yuliya.bozhko@totaralms.com>
MDL-47806: Add footer function for command line output.
MDL-47805 tool_monitor: More info in adhoc task
MDL-47647 lib: Fix message unit test failure.

Messaging unit tests on Windows were failing because
of a comparison between two file paths. Part of the
path would have a forward slash instead of a backslash
and so would fail.
MDL-47898 mod_quiz: Correct path when checking content_editable

Addresses a number of issues when using the text editor in a quiz using
secure mode.
MDL-47902 mod_scorm: Inappropriate default values for SCORM 1.3 variables
MDL-47916 web services: Fixed invalid returned value type
MDL-47918 mod_forum: Unsubscribe all - remove discussion subscriptions
MDL-47227 admin: Fix user bulk selection over 1000
MDL-47919 tool_monitor: adjustments to behat tests