If MathJax is loaded by any means, the editor should use it instead of the filter. This prevents
slow ajax requests and gives much better rendering. MathJax could be loaded by the filter,
or it could just be done the old way by sticking the include in the page header.

Some browsers do not bubble form submission events to the window, and we
had more than one form on the page in certain conditions. We need to select
all of the forms on a page and then test the action.

Do not show the collapse button if:
* it's specified after the cut-off and would therefore be unusable; or
* the total number of groups matches the number of groups to display anyway.

Conflicts:
	lib/editor/atto/plugins/image/yui/build/moodle-atto_image-button/moodle-atto_image-button-min.js

Conflicts:
	lib/deprecatedlib.php

Conflicts:
	lib/editor/atto/yui/build/moodle-editor_atto-editor/moodle-editor_atto-editor-min.js

Conflicts:
	lib/editor/atto/yui/build/moodle-editor_atto-editor/moodle-editor_atto-editor-min.js

Conflicts:
	theme/bootstrapbase/style/moodle.css

Conflicts:
	theme/bootstrapbase/style/moodle.css