[css-align] Add parenthetical about inset properties to more places (pending a reasonably stable spec that defines them properly). w3c#1429

Author: fantasai

css-align/Overview.bs

@@ -1245,7 +1245,8 @@ Block/Cross-Axis Alignment: the 'align-self' property</h3>
 			<th><a>Alignment Container</a>
 			<td>
 				The box's <a>containing block</a>,
-				as modified by the inset properties,
+				as modified by the inset properties
+				('top'/'right'/'bottom'/'left'),
 				assuming the <a>writing mode</a> of the <a>containing block</a>.
 		<tr>
 			<th><a>Alignment Subject</a>