Author: Shamim Rezaie
MDL-78885 comboboxsearch: Comboboxes should have a meaningful label
Also, used the combobox's label as the dialogue's label as well
http://git.moodle.org/gw?p=moodle.git;a=commit;h=c122998463d62498eea25000966ab7a745f01ad9
http://github.com/moodle/moodle/commit/c122998463d62498eea25000966ab7a745f01ad9
- 4.4 en [aria-comboboxsearchdialogue,core]