Selectmenu: ARIA tweaks for keyboard events and closed menu operation #755
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The combobox (the a.ui-button element) is now set to refer to the same label as the base select using ARIA labelledby.
Set the combobox to update its aria-activedependent attribute from the focus callback of the internal menu instance. Does the aria-activedependent attribute need to be cleared when the menu instance is closed?
The Space key will now active/deactivate the menu.