MDL-42605 portfolio_flickr: Photos can be added to a set on export
MDL-42605 portfolio_flickr: Do not auto select a set to export to
MDL-33536 navigation: hide hidden categories from the navbar
MDL-42640 quiz: Fix restore of backup without overduehandling setting

Use default quiz overduehandling setting when restoring a
backup from older Moodle version that does not have a quiz
overduehandling setting.
MDL-42723: Hide and handle LDAP error when user not in context being checked

MDL-41304 only fixed the case when 'Search subcontext' is enabled. We need to
fix the case when it's not enabled too.

While silencing errors with an @ should be avoided if possible, there's no
other way to prevent the warnings in this case.
MDL-42728 Merge English strings from the en_fix language pack
MDL-42666 repository_boxnet: Convert repository to APIv2

The support for downloading images when they are references
from Box.net have been dropped in this script as the new
API does not support references. Unfortunately the old
references thumbnails will not be updated any more.

Conflicts:

	lib/upgrade.txt
	repository/boxnet/lib.php
MDL-42666 repository_boxnet: Function to convert APIv1 references to true copies
MDL-42666 repository_boxnet: Tool to launch the migration
MDL-42666 repository_boxnet: Advise the user to run the migration tool
MDL-42666 repository_boxnet: Disabling file references
MDL-42666 repository_boxnet: Remove hardcoded date for APIv1 end of life
MDL-42666 oauthlib: Getter methods for accesstoken, client id and secret
MDL-42666 repository_boxnet: Revoke access token when logging out
MDL-42666 repository_boxnet: Alert the admins of the migration process

Conflicts:

	repository/boxnet/version.php
MDL-42666 repository_boxnet: Warn on HTTPS requirement when non HTTPS
MDL-42666 repository_boxnet: Convert all the references asap

This has been done in case the script fails during the processing
and needs to be re-run. Now all the references are converted as soon
as we can, where as before they could have ended up being re-downloaded.
MDL-42672 blocks: warnings on /mod/xxx/index.php for frontpage course
MDL-42697 Theme: Fix overflow on docked blocks
MDL-42666 repository_boxnet: Using the right reference