[orca] Mouse review: Only prefer document as top level object when in document

[Joanmarie Diggs <joanied src gnome org>]

commit 73c76618645edb53602aa76370edfc9e3b794425
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Mon Jul 15 10:37:06 2019 -0400

    Mouse review: Only prefer document as top level object when in document

 src/orca/mouse_review.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
---
diff --git a/src/orca/mouse_review.py b/src/orca/mouse_review.py
index 7661935ab..b0ff19056 100644
--- a/src/orca/mouse_review.py
+++ b/src/orca/mouse_review.py
@@ -488,7 +488,10 @@ class MouseReviewer:
                 debug.println(debug.LEVEL_INFO, msg, True)
                 menu = None
 
-        document = script.utilities.activeDocument()
+        document = None
+        if script.utilities.inDocumentContent():
+            document = script.utilities.activeDocument()
+
         obj = script.utilities.descendantAtPoint(menu, pX, pY) \
             or script.utilities.descendantAtPoint(document, pX, pY) \
             or script.utilities.descendantAtPoint(window, pX, pY)