[css-grid-1] Revert unintentional change to ignore grid items past 1st row for purpose of finding grid container baselines. Also clarify traversal order. #3645

Author: fantasai

css-grid-1/Overview.bs

@@ -3605,10 +3605,11 @@ Grid Container Baselines</h3>
 			the shared <a>alignment baseline</a> of those <a>grid items</a>.
 
 		<li>
-			Otherwise, if the grid container has at least one <a>grid item</a> whose area intersects the first (last) row,
+			Otherwise, if the grid container has at least one <a>grid item</a>,
 			the grid container's first (last) baseline set
 			is <a lt="generate baselines">generated</a> from
-			the <a>alignment baseline</a> of the first (last) such <a>grid item</a> (in row-major <a>grid order</a>).
+			the <a>alignment baseline</a> of the first (last) <a>grid item</a>
+			in row-major <a>grid order</a> (according to the <a>writing mode</a> of the <a>grid container</a>).
 			If the item has no <a>alignment baseline</a> in the grid's inline axis,
 			then one is first <a lt="synthesize baselines">synthesized</a>
 			from its border edges.
@@ -4731,6 +4732,30 @@ Major Changes</h4>
 				</dl>
 			</blockquote>
 	</ul>
+<h4 id="minor-2017">
+Minor Changes</h4>
+
+	<ul>
+		<li id="change-2017-first-baseline-item">
+			Revert unintentional change to ignore items past the first row
+			for the purpose of finding the grid container’s baselines.
+			Also clarify the traversal order.
+			(<a href="https://github.com/w3c/csswg-drafts/issues/3645">Issue 3645</a>)
+			<blockquote>
+				<ul>
+					<li>
+						Otherwise, if the grid container has at least one <a>grid item</a>
+						<del>whose area intersects the first (last) row</del>,
+						the grid container's first (last) baseline set
+						is <a lt="generate baselines">generated</a> from
+						the <a>alignment baseline</a> of the first (last) <del>such</del> <a>grid item</a>
+						in row-major <a>grid order</a> <ins>(according to the <a>writing mode</a> of the <a>grid container</a>)</ins>.
+						If the item has no <a>alignment baseline</a> in the grid's inline axis,
+						then one is first <a lt="synthesize baselines">synthesized</a>
+						from its border edges.
+				</ul>
+			</blockquote>
+	</ul>
 
 <h4 id="clarify-2017">
 Clarifications</h4>