MDL-35530 Lesson Module: Add question text to facilitate grading
MDL-29733 grade: Query for Identifying Grade Grades to Precreate is SLOW
MDL-29733 grade: SQL and comment cleanup
MDL-36736 course: Availability information will use hide class for hidding
MDL-36736 course: Availability information should not be visible for hidden modules

If user is viewing hidden module, availability information should only be visible to
user when editing and module is visible. If editing and module is hidden, then hide
availablilty information as it's invalid.
When user is not editing and activity is hidden then don't add availability information.
MDL-36741 mod_forum: fixed SQL that was generated when either timed posts or groups were enabled
MDL-30899 moodle-enrol-notification Replacing Y.Overlay for Y.Panel

References to lightbox are still there to maintain the same
external API but are converted to a modal attribute internally,
same with closeButton, not it uses the Y.Panel close button
MDL-30899 modchooser Changing from overlay to panel references
MDL-30899 block_community Changing from overlay to panel references
MDL-30899 moodle-enrol-notification Adding H1 to notifications headers
MDL-30899 moodle-enrol-notification Adding focus to non modal windows
MDL-31824 - Calendar - Fixing HTML classes fopr calendar month view - patch provided by Mark Ward
MDL-35979 - Commenting - Adding an empty alt attribute to the javascript generated delete icon for comments
MDL-32639 files: Removing '0' start folder in archives created with filemanager

Signed-off-by: Vadim Dvorovenko <vadimon@mail.ru>
MDL-35740 Assignment: Show students the status of own submission on overview page.

This is a minimal patch just for backporting to 23.
MDL-29334 mod_data: if site-wide presets created in <= 1.9 exist convert them to 2.x
MDL-32639 files: Improved File Manager download and zip support

Conflicts:

	lib/filestorage/zip_packer.php
MDL-32639 files: Zipping a folder does not overwrite existing files
MDL-37014 repository_webdav - strip the server URL from file & folder paths returned by webdav lib (if present)
MDL-37078: Restore - section restore fails with multiple availability conditions