Log Message:
Update to 4.3.50:

* One more slight adjustment to the fix for bug 135064
  (http://bugzilla.gnome.org/show_bug.cgi?id=135064)
  Entering numbers that start with the numeric point character ('.")
  are now visibly displayed.

* Adjustment to the fix for bug 135064
  (http://bugzilla.gnome.org/show_bug.cgi?id=135064)
  Fix to remove a potential spurious initial thousands separator
  character after a change sign operation.