MDL-39740 grade: Fix grade_item::add_idnumber strict type checking
MDL-39759 REST SERVER HTTP response code

Moodle should response 403 if web service or REST protocol not enabled
[MDL-44170] Added form field for url matched type.

Added a new mod_form field called urlmatchedtypeid which is populated
by mod_form.js when a matched url is entered. On save, if typeid is 0
and urlmatchedtypeid is supplied, the type id is set to the url matched
id.
MDL-44669: mod/assign: fix batchoperations JS when using select all checkboxes.
MDL-44677 mod_scorm - do not update unchanged scorm_scoes_track data
MDL-31679 gradereport_grader: Add a horizontal scroll bar to the top of the grader report
MDL-29572 Grade Import: Avoid creating invalid temporary rows; Provide feedback on error
MDL-41569: CSS Allow flexible table headers to wrap.
MDL-44507 filemanager: indicator for clicking Download All in filemanager
MDL-33486 wiki: allow searching individual wikis
MDL-44806 Atto: Prevent Accessibility Checker dialog from being needlessly large
MDL-44784 atto: Show settings link on plugins list
MDL-44748 Atto: Make it the default on upgrade.
MDL-44868 editor_atto: Toolbar navigation ignores disabled buttons
MDL-44868 editor_atto: Prevent disable buttons to keep tabIndex

Now, if a button gets disabled but the tabIndex and the focus
are on that button, the focus and tabIndex are moves to its
closest neighbour.
MDL-44870 atto_noautolink: Remove plugin from default toolbar settings
MDL-44869 atto_noautolink: Highlight button when noautolink is active
MDL-43975 Sessions: Should support memcache, not just memcached

This commit adds a session handler which works using memcache (without
requiring the memcached extension), similar to the support for
memcache within MUC.

This may be less reliable than memcached but we have been using a
similar approach on our system without problems. In case, I added a
warning in config-dist.php.
MDL-44912 libraries: Allow empty values in admin setting colour picker
MDL-42195 Bootstrap: Make bootstrap responsive images "opt-in".

This responsive image behaviour prevents setting of image sizes in text editors,
as well as a string of pix icon bugs / profile image bugs across Moodle.

We are switching to Bootstrap 3 syntax where you need img-responsive class to images
that want this behaviour.