[orca] Web: Add tree and tree table as structural navigation containers

[Joanmarie Diggs <joanied src gnome org>]

commit bb5c948c240e120f4dbbd4c02bfadc11da7419d7
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Mon Mar 22 13:59:01 2021 +0100

    Web: Add tree and tree table as structural navigation containers
    
    Orca's structural navigation commands include comma to jump to the
    end of a container and shift+comma to jump to the start of it. This
    functionality might prove handy in trees and tables being examined
    in browse mode.

 src/orca/structural_navigation.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
---
diff --git a/src/orca/structural_navigation.py b/src/orca/structural_navigation.py
index 676efc808..c93c419cb 100644
--- a/src/orca/structural_navigation.py
+++ b/src/orca/structural_navigation.py
@@ -627,7 +627,9 @@ class StructuralNavigation:
                        pyatspi.ROLE_MARQUEE,
                        pyatspi.ROLE_PANEL,
                        pyatspi.ROLE_SECTION,
-                       pyatspi.ROLE_TABLE]
+                       pyatspi.ROLE_TABLE,
+                       pyatspi.ROLE_TREE,
+                       pyatspi.ROLE_TREE_TABLE]
 
     IMAGE_ROLES = [pyatspi.ROLE_IMAGE,
                    pyatspi.ROLE_IMAGE_MAP]