For the case where the action_link template is shown as disabled:
* Allow extra classes to be set on on the class attribute.
* Allow extra attributes to be set.

Also use aria-hidden on unicode symbol for hamburger.

This allows filetype restrictions to work when uploading additional
preset files on the Boost admin settings page.

Added an aria label to the course filter in the
messaging page.

Because 0 == 'participants' in php.

Put it in the API so it can't be skipped.

Check that there are switchable roles before showing the link in the user menu.

We added a link to the user menu so we have to adjust the tests.

Take this out of the navigation and force it in the user menu.