Author: Mathew May
MDL-78885 core_user: A11y fixes for user combobox search
Co-authored-by: Shamim Rezaie <shamim@moodle.com>
http://git.moodle.org/gw?p=moodle.git;a=commit;h=e4083441ecdf7d8d2ff1b1da7f419b4374a26e72
http://github.com/moodle/moodle/commit/e4083441ecdf7d8d2ff1b1da7f419b4374a26e72
+ 4.4 en [aria-toggledropdown,core]
+ 4.4 en [aria-comboboxsearchdialogue,core]
+ 4.4 en [aria-comboboxsearchitems,core]