[css-overflow-3][editorial] Move item.

Author: fantasai

css-overflow-3/Overview.bs

@@ -223,6 +223,19 @@ Scrollable Overflow</h3>
 			Issue: Is this description of handling transforms
 			sufficiently accurate?
 
+		<li>
+			The margin areas of <a>grid item</a> and <a>flex item</a> boxes
+			for which the box establishes a containing block.
+
+			The UA may <em>additionally</em> include
+			the margin areas of other boxes
+			for which the box establishes a containing block;
+			however,
+			the conditions under which such margin areas are included
+			is undefined in this level.
+			<span class="issue">This needs further testing and investigation;
+			is therefore deferred in this draft.</span>
+
 		<li>
 			The <a>scrollable overflow areas</a> of all of the above boxes
 			(accounting for transforms as described above),
@@ -267,19 +280,6 @@ Scrollable Overflow</h3>
 			<a href="http://jsbin.com/vexahocayi/1/edit?html,css,output">clear</a>.
 
 			<!-- Make sure http://jsbin.com/qececaqilo/edit?html,css,output is clearly defined. -->
-
-		<li>
-			The margin areas of <a>grid item</a> and <a>flex item</a> boxes
-			for which the box establishes a containing block.
-
-			The UA may <em>additionally</em> include
-			the margin areas of other boxes
-			for which the box establishes a containing block;
-			however,
-			the conditions under which such margin areas are included
-			is undefined in this level.
-			<span class="issue">This needs further testing and investigation;
-			is therefore deferred in this draft.</span>
 	</ul>
 
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