Fix broken cross-references to CSSOM

Fixes #848 by updating things related to CSS style sheet sets to the
latest CSSOM terminology.

source

@@ -3646,7 +3646,10 @@ a.setAttribute('href', 'http://example.com/'); // change the content attribute d
          <dfn data-noexport="" data-x="concept-css-style-sheet-CSS-rules" data-x-href="https://drafts.csswg.org/cssom/#concept-css-style-sheet-css-rules">CSS rules</dfn>,
          <dfn data-noexport="" data-x="concept-css-style-sheet-origin-clean-flag" data-x-href="https://drafts.csswg.org/cssom/#concept-css-style-sheet-origin-clean-flag">origin-clean flag</dfn>
      </li>
-     <li><dfn data-noexport="">Alternative style sheet sets</dfn> and the <dfn data-noexport="">preferred style sheet set</dfn></li>
+     <li><dfn data-noexport="" data-x-href="https://drafts.csswg.org/cssom/#css-style-sheet-set">CSS style sheet set</dfn></li>
+     <li><dfn data-noexport="" data-x-href="https://drafts.csswg.org/cssom/#css-style-sheet-set-name">CSS style sheet set name</dfn></li>
+     <li><dfn data-noexport="" data-x-href="https://drafts.csswg.org/cssom/#preferred-css-style-sheet-set-name">preferred CSS style sheet set name</dfn></li>
+     <li><dfn data-noexport="" data-x-href="https://drafts.csswg.org/cssom/#change-the-preferred-css-style-sheet-set-name">change the preferred CSS style sheet set name</dfn></li>
      <li><dfn data-noexport="" data-x-href="https://drafts.csswg.org/cssom/#serialize-a-css-value">Serialising a CSS value</dfn></li>
      <li><dfn data-noexport="" data-x-href="https://drafts.csswg.org/cssom-view/#run-the-resize-steps">run the resize steps</dfn></li>
      <li><dfn data-noexport="" data-x-href="https://drafts.csswg.org/cssom-view/#run-the-scroll-steps">run the scroll steps</dfn></li>
@@ -12769,7 +12772,7 @@ interface <dfn>HTMLLinkElement</dfn> : <span>HTMLElement</span> {
   <p>The <dfn><code data-x="attr-link-title">title</code></dfn> attribute gives the title of the
   link. With one exception, it is purely advisory. The value is text. The exception is for style
   sheet links, where the <code data-x="attr-link-title">title</code> attribute defines
-  <span>alternative style sheet sets</span>.</p>
+  <span data-x="CSS style sheet set">CSS style sheet sets</span>.</p>
 
   <p class="note">The <code data-x="attr-link-title">title</code> attribute on <code>link</code>
   elements differs from the global <code data-x="attr-title">title</code> attribute of most other
@@ -13597,8 +13600,8 @@ people expect to have work and what is necessary.
 
    <dd>
 
-    <p>This pragma sets the name of the default <span data-x="alternative style sheet
-    sets">alternative style sheet set</span>.</p>
+    <p>This pragma sets the <span data-x="CSS style sheet set name">name</span> of the default
+    <span>CSS style sheet set</span>.</p>
 
     <div w-nodev>
 
@@ -13607,8 +13610,9 @@ people expect to have work and what is necessary.
      <li><p>If the <code>meta</code> element has no <code data-x="attr-meta-content">content</code>
      attribute, or if that attribute's value is the empty string, then abort these steps.</p></li>
 
-     <li><p>Set the <span>preferred style sheet set</span> to the value of the element's <code
-     data-x="attr-meta-content">content</code> attribute. <ref spec=CSSOM></p></li>
+     <li><p><span>Change the preferred CSS style sheet set name</span> with the name being the value
+     of the element's <code data-x="attr-meta-content">content</code> attribute. <ref
+     spec=CSSOM></p></li>
 
     </ol>
 
@@ -14141,10 +14145,10 @@ interface <dfn>HTMLStyleElement</dfn> : <span>HTMLElement</span> {
   value is text. <ref spec="CSP"></p>
 
   <p id="title-on-style">The <dfn><code data-x="attr-style-title">title</code></dfn> attribute on
-  <code>style</code> elements defines <span>alternative style sheet sets</span>. If the
-  <code>style</code> element has no <code data-x="attr-style-title">title</code> attribute, then it
-  has no title; the <code data-x="attr-title">title</code> attribute of ancestors does not apply to
-  the <code>style</code> element. <ref spec=CSSOM></p>
+  <code>style</code> elements defines <span data-x="CSS style sheet set">CSS style sheet
+  sets</span>. If the <code>style</code> element has no <code data-x="attr-style-title">title</code>
+  attribute, then it has no title; the <code data-x="attr-title">title</code> attribute of ancestors
+  does not apply to the <code>style</code> element. <ref spec=CSSOM></p>
 
   <p class="note">The <code data-x="attr-style-title">title</code> attribute on <code>style</code>
   elements, like the <code data-x="attr-link-title">title</code> attribute on <code>link</code>
@@ -116977,7 +116981,7 @@ interface <dfn>External</dfn> {
      <th> <code data-x="">title</code>
      <td> <code data-x="attr-link-title">link</code>;
           <code data-x="attr-style-title">style</code>
-     <td> Alternative style sheet set name
+     <td> <span>CSS style sheet set name</span>
      <td> <a href="#attribute-text">Text</a>
     <tr>
      <th> <code data-x="">translate</code>