MDL-42495 lesson Prevent coding error for invalid user
MDL-34020: Further work on IMS package importing when using Blackboard packages
MDL-43109: mod/wiki - When editing pages populate the default value for the tags input.
MDL-43302 JavaScript: Migrate moodle-form-passwordunmask to use Shifter
MDL-43262 JavaScript: Correct width attribute override

This should be done using an attribute modification, rather than at the
constructor level.
MDL-43262 JavaScript: Correct visible attribute override

This should be done using an attribute modification, rather than at the
constructor level.
MDL-43262 JavaScript: Correct use of centered attribute override

This should be done using an attribute modification, rather than at the
constructor level.
MDL-40918 mod_lti: replaced 'view' and 'view all' add_to_log calls with events
MDL-40918 mod_lti: removed the 'launch' add_to_log call

This add_to_log call is unnecessary and does not need to be replaced with an event.
It is called whenever we view the external tool, which will trigger the view event.
There is no need for two events when this occurs.
MDL-43531 Course: Remove deprecated functions from dnduploadlib

These functions were deprecated in 2.5 and are due for removal in 2.7.

Removing as per deprecation policy.
MDL-43460 calendar: Decode event description links on restore
MDL-39661 blocks: More verbose move-block-here descriptions
MDL-40705 theme_bootstrapbase: Handling of long words in block content
MDL-35423 JavaScript: Reduce specifity of course AJAX

Some themes may choose not to use the same layout as core themes. Reduce
the specifity of these to allow other themes to use our JavaScript without
following the same markup.
MDL-41810 badges: Remove hardcoded references to backpack.openbadges.org
MDL-33600 Assign: Allow teachers to skip notifying students about grade update.
MDL-33600 Assign: Add an admin setting to set the default for sendstudentnotifications
MDL-33952 Assignment - bon voyage!

mod_assignment has been replaced with a stub that only exists to support restoring and
auto upgrading to mod_assign. If you require mod_assignment for some old plugin, then
overwrite with the 2.6 version manually.
MDL-39603 theme_bootstrapbase: Alignment of filter form elements on enrol page
MDL-43412 quiz with grade period and password did not work.

Once the attempt became overdue, it was impossible to get in to submit
it because of a redirect loop. This fix resovles that loop, so the
student can enter their password and get in.