Update release notes for 7.4

* Match TOC headers with actual headers
* New browser versions

Change-Id: I1476d41ee66ffb1876aac89998d4ca03d47e1240

WebContent/release-notes.html

@@ -41,26 +41,23 @@
         <ul>
             <li><a href="#overview">Overview of Vaadin
                     @version@ Release</a></li>
-            <li><a href="#changelog">Change log for Vaadin
+            <li><a href="#changelog">Change Log for Vaadin
                     @version@</a></li>
             <li><a href="#enhancements">Enhancements in Vaadin
                     @version-minor@</a></li>
-            <li><a href="#incompatible">Incompatible or behavior-altering changes in
-                    @version-minor@</a></li>
-            <li><a href="#knownissues">Known issues in
-                    @version-minor@</a></li>
-            <li><a href="#limitations">Limitations in
+            <li><a href="#incompatible">Incompatible or Behavior-altering Changes in
                     @version-minor@</a></li>
+            <li><a href="#knownissues">Known Issues</a></li>
+            <li><a href="#limitations">Limitations</a></li>
             <li><a href="#vaadin">Vaadin Installation</a></li>
             <li><a href="#package">Package Contents</a></li>
-            <li><a href="#migrating">Migrating from Vaadin 6 to
-                    Vaadin 7</a></li>
+            <li><a href="#migrating">Migrating from Vaadin 6</a></li>
             <li><a href="#dependencies">Vaadin @version@
                     dependencies</a></li>
             <li><a href="#upgrading">Upgrading to Vaadin
                     @version-minor@</a></li>
             <li><a href="#supportedversions">Supported
-                    technologies</a></li>
+                    Technologies</a></li>
             <li><a href="#vaadinontheweb">Vaadin on the Web</a></li>
         </ul>
 
@@ -74,7 +71,7 @@
         </p>
 
         <!-- ================================================================ -->
-        <h3 id="changelog">Change log for Vaadin @version@</h3>
+        <h3 id="changelog">Change Log for Vaadin @version@</h3>
 
         <p>This release includes the following closed issues:</p>
 
@@ -127,7 +124,7 @@
                 Notes for Vaadin 7.3.0</a>.
         </p>
 
-        <h3 id="incompatible">Incompatible or behavior-altering changes in @version-minor@</h3>
+        <h3 id="incompatible">Incompatible or Behavior-altering Changes in @version-minor@</h3>
         <ul>
             <li>
                 <p>The org.json and com.google.gwt.json libraries have been replaced by elemental.json.</p>
@@ -140,7 +137,7 @@
             <li>Window's accessibility shortcut was moved to server-side. Now setCloseShortcut overrides the default value, while addCloseShortcut can be used to add more than one shortcut key for closing the window.
                 The protected value closeShortcut in Window was removed.</li>
         </ul>
-        <h3 id="knownissues">Known issues</h3>
+        <h3 id="knownissues">Known Issues</h3>
         <ul>
             <li>Drag'n'drop in a Table doesn't work on touch devices running
                 Internet Explorer (Windows Phone, Surface)
@@ -332,7 +329,7 @@
             directory of the web application that uses validation.
         </p>
 
-        <h2 id="upgrading">Upgrading from Vaadin 7.1 to Vaadin @version-minor@</h2>
+        <h2 id="upgrading">Upgrading to Vaadin @version-minor@</h2>
 
         <p>When upgrading from an earlier Vaadin version, you must:
         </p>
@@ -514,12 +511,12 @@
         </p>
 
         <ul>
-            <li>Mozilla Firefox 18-34</li>
+            <li>Mozilla Firefox 18-35</li>
             <li>Mozilla Firefox 17 ESR, 24 ESR, 31 ESR</li>
             <li>Internet Explorer 8-11</li>
             <li>Safari 6-8</li>
             <li>Opera 16-27</li>
-            <li>Google Chrome 23-39</li>
+            <li>Google Chrome 23-40</li>
         </ul>
 
         <p>