Improve tree-structural pseudo-classes links

Author: shvaikalesh

selectors-4/Overview.bs

@@ -385,64 +385,64 @@ Selectors Overview</h2>
 			<tr>
 				<td><code>E:root</code>
 				<td>an E element, root of the document
-				<td>[[#structural-pseudos]]
+				<td>[[#the-root-pseudo]]
 				<td>3
 			<tr>
 				<td><code>E:empty</code>
 				<td>an E element that has no children (neither elements nor text) except perhaps white space
-				<td>[[#structural-pseudos]]
+				<td>[[#the-empty-pseudo]]
 				<td>3
 			<tr>
 				<td><code>E:nth-child(<var>n</var> [of <var>S</var>]?)</code>
 				<td>an E element, the <var>n</var>-th child of its parent matching <var>S</var>
-				<td>[[#child-index]]
+				<td>[[#the-nth-child-pseudo]]
 				<td>3/4
 			<tr>
 				<td><code>E:nth-last-child(<var>n</var> [of <var>S</var>]?)</code>
 				<td>an E element, the <var>n</var>-th child of its parent matching <var>S</var>,
 						counting from the last one
-				<td>[[#child-index]]
+				<td>[[#the-nth-last-child-pseudo]]
 				<td>3/4
 			<tr>
 				<td><code>E:first-child</code>
 				<td>an E element, first child of its parent
-				<td>[[#child-index]]
+				<td>[[#the-first-child-pseudo]]
 				<td>2
 			<tr>
 				<td><code>E:last-child</code>
 				<td>an E element, last child of its parent
-				<td>[[#child-index]]
+				<td>[[#the-last-child-pseudo]]
 				<td>3
 			<tr>
 				<td><code>E:only-child</code>
 				<td>an E element, only child of its parent
-				<td>[[#child-index]]
+				<td>[[#the-only-child-pseudo]]
 				<td>3
 			<tr>
 				<td><code>E:nth-of-type(<var>n</var>)</code>
 				<td>an E element, the <var>n</var>-th sibling of its type
-				<td>[[#typed-child-index]]
+				<td>[[#the-nth-of-type-pseudo]]
 				<td>3
 			<tr>
 				<td><code>E:nth-last-of-type(<var>n</var>)</code>
 				<td>an E element, the <var>n</var>-th sibling of its type,
 						counting from the last one
-				<td>[[#typed-child-index]]
+				<td>[[#the-nth-last-of-type-pseudo]]
 				<td>3
 			<tr>
 				<td><code>E:first-of-type</code>
 				<td>an E element, first sibling of its type
-				<td>[[#typed-child-index]]
+				<td>[[#the-first-of-type-pseudo]]
 				<td>3
 			<tr>
 				<td><code>E:last-of-type</code>
 				<td>an E element, last sibling of its type
-				<td>[[#typed-child-index]]
+				<td>[[#the-last-of-type-pseudo]]
 				<td>3
 			<tr>
 				<td><code>E:only-of-type</code>
 				<td>an E element, only sibling of its type
-				<td>[[#typed-child-index]]
+				<td>[[#the-only-of-type-pseudo]]
 				<td>3
 		<tbody>
 			<tr>