Set initial value of aria-selected to false #35
Description
Currently, the combobox multiselect has a bug where screen readers (tested with NVDA latest) will not read the selected value on the first selected item. I believe this may be caused by the aria-selected attribute getting dynamically added on the first key down for enter. I recommend setting aria-selected="false" initially when the combobox is rendered on the page that way screen readers have access to the default values.
Related discussion: nvaccess/nvda#11986