[orca] Don't ignore object:state-changed:showing events for dialogs

[Joanmarie Diggs <joanied src gnome org>]

commit 65f39ddeb40afa11a03427ee6d0156e9ea8bee0b
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Tue Feb 18 18:01:49 2020 +0100

    Don't ignore object:state-changed:showing events for dialogs
    
    Dialogs which are not automatically focused won't emit window:activate.
    There may be a need to present them, however.

 src/orca/event_manager.py | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/src/orca/event_manager.py b/src/orca/event_manager.py
index 05a76b063..21a7fbe46 100644
--- a/src/orca/event_manager.py
+++ b/src/orca/event_manager.py
@@ -194,6 +194,7 @@ class EventManager:
                             pyatspi.ROLE_INFO_BAR,
                             pyatspi.ROLE_MENU,
                             pyatspi.ROLE_NOTIFICATION,
+                            pyatspi.ROLE_DIALOG,
                             pyatspi.ROLE_PANEL,
                             pyatspi.ROLE_STATUS_BAR,
                             pyatspi.ROLE_TOOL_TIP]: