MDL-41767 themes: Support for parent-specific sheets in plugins
MDL-44066 caching Don't advertise session mode for MongoDB and memcached
MDL-44139 admin: standardise warning renderer use

Take three handcoded warnings and convert them to calling
the 'warning' renderer like rest of the file.

Then remove redundant CSS and/or move specific CSS to generic
places so it's shared.
MDL-41175 mod_imscp: unified @package use
MDL-41176 mod_label: unified @package use
MDL-41177 mod_lesson: unified @package use
MDL-41178 mod_lti: unified @package use
MDL-41179 mod_page: unified @package use
MDL-34319 auth_cas: Fixed issue with undefined variable: ldapconnection
MDL-43405 auth_ldap: Fixed issue with undefined variable: ldap_cookie
MDL-43723 restrict the drag and drop to the move icon instead of dragging the entire block header
MDL-40619 behat: test for creating a one-question quiz
MDL-44247 mod_scorm: Reference to SYSTEM_CONTEXT instead of real context
MDL-44168 html: border=1 on regexdetect table
MDL-42889 cleanup obsolete clam relatd code

Since 2.0 all uploaded files need to go through the file picker which does the scanning,
the idea is that it is more important to warn users that their computer is crawling
with viruses. All teachers are supposed to have local up-to-date antivirus software!

Since 2.0 we are not scanning existing files on server, in future we might use the
status flag in files table to indicate the file is problematic, but still we should
never detele anthing from the filedir...
MDL-40916 mod_imscp: replaced 'view' add_to_log call with an event
MDL-40916 mod_imscp: replaced 'view all' add_to_log call with an event
MDL-18633 User profile: add last ip field to user view
MDL-44264 badges Add badges to the user short profile page.
MDL-44269 theme_clean: Change location of navbar (breadcumb) to below logo.