Steps to reproduce:

1. Launch Writer and Accerciser.

2. In Accerciser, select soffice in the list of accessibles on the left, then
choose the Event Monitor page tab. Choose "Selected application" in the  Source
group of radio buttons. In the tree of of event types, expand "object" and check
"active-desendant-changed" and "selection-changed".

3. Having done the above, get into Writer's Character dialog by choosing it from
the Format menu. Move to the Font page if you're not automatically placed there.

4. Give focus to the Font text object. Press Up and Down Arrow to change the
selection.

5. Give focus to the Typeface text object. Press Up and Down Arrow to change the
selection.

6. Give focus to the Size text object. Press Up and Down Arrow to change the
selection.

Expected results: When performing steps 4, 5, and 6, each press of an Arrow key
would cause an object:active-descendant-changed event and an
object:selection-changed event to each be emitted.

Actual results: We get the expected results for steps 4 and 5, but not for step 6.

Looking at the accessible hierarchy for the above items, the scrollable lists of
Fonts and Typefaces are each of ROLE_LIST whereas the list of sizes is of
ROLE_SCROLL_PANE. Would it be possible/make sense for Size to have a similar
structure as Font and Typeface? If not, some other way of causing us to get an
active-descendant-changed and/or a selection-changed event would be appreciated.

Thanks!