MDL-45212 scorm: Disable sorting on unsortable columns in SCORM reports
MDL-44902: Several additions to External Tool (LTI)

* LTI service related changes:
** Fixing exceptions in OAuth library.
** Added new launch option, Existing window: replaces entire page with the LTI object.
** The LTI tool ID used to perform the launch is now sent with the LTI launch parameters.  This is sent back to Moodle on subsequent requests.
** Added $CFG->mod_lti_forcessl to force SSL on all LTI launches.
** Added new LTI launch parameter: tool_consumer_instance_name.  Default value is site full name, but can be customized with $CFG->mod_lti_institution_name.
** The LTI grade service endpoints now set the affected user to the session.  This was required for event listeners.
** Fix the grade deletion service.  Was deleting the grade item instead of just the grade.
** Send error response when LTI instance does not accept grades and grades are being sent.
** Added a method for writing incoming LTI requests to disk for debugging.  Disabled by default.
* Changes for ltisource plugins:
** Can now to plug into backup/restore.
** Can now have settings.php files.
** Can now hook into the LTI launch and edit parameters.
* Several grade changes:
** Added standard_grading_coursemodule_elements to LTI instance edit form.  This means LTI instances can be configured with a grade.
** No longer assumes that grade is out of 100.
** Replaced modl/lti:grade capability with mod/lti:view.
* JS on mod/lti/view.php for resizing the content object has been converted to YUI3.
* Fixed misspellings in language file.
* Added hooks for log post and view actions.
* Bug fix for lti_get_url_thumbprint() when the URL is missing a schema.
MDL-44902: Deprecating mod/lti/grade.php
MDL-44902: Bumping mod/lti version number

This bump is to update the site with changes
to the db/access.php file.
MDL-23566 mod_lesson: Float answers so paragraphs line up correctly next to the inputs
MDL-45447 editor_atto: Highlight collapse and html icons when toggled
MDL-45432 mod_assign Declare character encoding in onlinetext export

Signed-off-by: Tony Butler <tonyjbutler@gmail.com>
MDL-45472 AJAX: Whitelist prototype values form JS Error in exception dialogue
MDL-45478 Conditional availability: Custom user restriction missing

There was an error in the JavaScript and custom user field
restrictions did not show correctly when editing the form.

Behat tests didn't cover custom user fields, so I added a
scenario.
MDL-45483 mod_forum: corrects values for maxattachments in forum settings
MDL-45496 core Added space to logged in as line
weekly back-to-dev release 2.8dev
Automatically generated installer lang files
MDL-45502 Bump release to 2.8 dev branch
Automatically generated installer lang files
MDL-45514 behat: Fixed should_not_exist timout param
MDL-44486 core: Rewrite JavaScript progressbar
MDL-45380 theme_bootstrapbase: Restore config override highlight
MDL-45130 editor_atto: Remove debugging messages for missing plugins

This is no longer required as the toolbar configuration prevents
missing plugins from being set. However, even if we do not output
any notice, we ignore missing plugins to prevent errors in case
one was uninstalled but left in the editor toolbar.
Merge branch 'wip-mdl-45514' of git://github.com/rajeshtaneja/moodle