Created attachment 264819 [details]
accessible-event listener

Steps to reproduce:
1. Open the attached accessible-event listener in a terminal
2. Launch gtk3-demo's Application Class demo
3. Get into the Preferences menu
4. Choose the color submenu
5. Press Right to select the first item in the color submenu
6. Press Left to move keyboard focus out of the color submenu

Expected results: At step 6, some state-changed event would be emitted to inform ATs that "Color" was reselected (i.e. that Up/Down will now move you in the Preferences menu).

Actual results: At step 6, there is no state-changed event to inform ATs that "Color" was reselected.

Notes:
* Currently there is a focus: event to inform ATs that "Color" was
  reselected, but this event type has been deprecated so Orca will
  need some other notification that what has keyboard focus has
  changed.

* Because we are seeing object:state-changed:selected on menus and
  menu items (and not object:state-changed:focused), I think it
  would be helpful to have this event at step 6 as well. Yes, even
  though technically the Color menu never became unselected. ;)
  Failing that, object:state-changed:focused should be fine.