also loses :disabled.
* __shortcut uses `margin-left: auto`, so it must be the LAST CHILD INSIDE
the item. Outside the item it will not right-align.
* use the real `disabled` attribute, not a class — base handles the hover
suppression off :disabled.
Positioning/dismiss is wired below by hand; scitex-ui is shipping a
`ts/app/context-menu` module (open-at-cursor, viewport clamping, outside-click
/Escape/scroll dismissal, items-array API) and this markup is exactly what it
emits, so swapping to it will not change this block.
{% endcomment %}
Select an agent to open the thread.