[orca] Ensure field labels are displayed when the field first gets focus

[Joanmarie Diggs <joanied src gnome org>]

commit 285bfa2b084f4056a09be33f9ad5d81627181319
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Tue Jan 16 11:39:32 2018 -0500

    Ensure field labels are displayed when the field first gets focus

 src/orca/braille.py |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/src/orca/braille.py b/src/orca/braille.py
index eecb2a9..df80286 100644
--- a/src/orca/braille.py
+++ b/src/orca/braille.py
@@ -1164,7 +1164,8 @@ def refresh(panToCursor=True,
         elif cursorOffset >= (viewport[0] + _displaySize[0]):
             viewport[0] = max(0, cursorOffset - _displaySize[0] + 1)
         else:
-            viewport[0] = max(0, cursorOffset)
+            rangeForOffset = _getRangeForOffset(cursorOffset)
+            viewport[0] = max(0, rangeForOffset[0])
 
     startPos, endPos = _adjustForWordWrap()
     viewport[0] = startPos