MDL-44670 themes: Updated screenshots of Clean and More
MDL-44590 category: correct get_string component
MDL-44590 behat: Add test for course category idnumber duplication
MDL-28261 Javascript: Check for a working connection in SCORM activities
MDL-34353 Javascript: Allow chooser dialogues to fall back to non-JS version

In order for a chooser dialogue to be able to fall back to it's non-JS
equivalent, we need to use a different set of styles.

This change makes the chooser dialogue preparation function add a new class
to the body which is utilised in the CSS to accomplish this. When the class
is not present, the dialogue content is displayed inline.
MDL-44739 theme_more: Set default theme settings
MDL-44719 libraries: Invalid call to ajaxenabled()

A bad conflict resolution in 7eaca5a810123746cdc69bf04dc7dc32a13533bc
wiped this function from the deprecatedlib file. This patch
restores it.

But as we should not call any deprecated function in core we
also remove the its usage.
MDL-44745 Assign: Make the grading table use the fullname function from the assign class.

This will take blind marking into account when displaying student names.
MDL-44745 Assign: Fix typo in assign->fullname function

This is a new function on master only.
MDL-44804 editor_atto: JS error when filepicker is disabled
MDL-32729 Question: Switch to the YUI3 chooser dialogue

This uses the core chooserdialogue and associated style changes to make an
easily generated chooser with question descriptions.
MDL-32729 Question: Convert remaining Questionbank code to YUI3
MDL-44822 assignfeedback_editpdf: Stop test generation in is_enabled()

This change also moves one of the checks in test_gs_path. If
generateimage is false, there's no need to stat for the fixture file.
MDL-44701 gradereport_grader: Display warning on navigation if unsaved grades are present
MDL-43284 Theme: Clean theme errors with padding in Question Bank fixed
MDL-44824 add missing subplugin type names
MDL-44824 add missing subplugin type names
MDL-44824 add missing subplugin type names
MDL-44762 editor_atto: Closing dropdowns when item is clicked
MDL-43398 Wiki: Choose... options cause SQL errors or seen inappropriate.