Make sure the cursor is a hand for the Extension Commands link.

BUG=137319
TEST=Hover over the Extension Commands link and make sure the hand appears. Also make sure the link works as before.
Review URL: https://chromiumcodereview.appspot.com/10821102

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@149386 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/resources/extensions/extensions.html

@@ -73,7 +73,8 @@
         i18n-content="extensionSettingsGetMoreExtensions"></a>
     <a target="blank_" hidden
         class="extension-commands-config"
-        i18n-content="extensionSettingsCommandsLink"></a>
+        i18n-content="extensionSettingsCommandsLink"
+        href="#"></a>
   </div>
 </div>
 

chrome/browser/resources/extensions/extensions.js

@@ -151,6 +151,7 @@ cr.define('extensions', function() {
       ExtensionSettings.showOverlay($('extensionCommandsOverlay'));
       chrome.send('coreOptionsUserMetricsAction',
                   ['Options_ExtensionCommands']);
+      e.preventDefault();
     },
 
     /**