default underlay underpathing to enabled as well

lib/elements/auto_fill.py

@@ -139,9 +139,9 @@ class AutoFill(Fill):
                   'are not visible.  This gives them a jagged appearance.'),
         group=_('AutoFill Underlay'),
         type='boolean',
-        default=False)
+        default=True)
     def underlay_underpath(self):
-        return self.get_boolean_param('underpath', False)
+        return self.get_boolean_param('underpath', True)
 
     def shrink_or_grow_shape(self, amount):
         if amount: