[css2] Added editor comment about direction of overflow based on statement from Martin in msg 0274

--HG--
extra : convert_revision : svn%3A73dc7c4b-06e6-40f3-b4f7-9ed1dbc14bfc/trunk%401076

Author: ianbjacobs

css2/visufx.src

@@ -60,6 +60,9 @@ the direction specified by the current value of the <span
 class="propinst-direction">'direction'</span> property. Additional
 height will be added to the bottom.
 
+<!-- The direction property of the containing block element
+or of this element? -IJ  -->
+
 <dt><strong>hidden</strong> 
 
 <dd>This value indicates that the dimensions of the <a