Encourage user to set email in issue reporter

chrome/content/ui/sendReport.xul

 <?xml version="1.0"?>
 
 <!--
   - This file is part of the Adblock Plus,
   - Copyright (C) 2006-2012 Eyeo GmbH
   -
   - Adblock Plus is free software: you can redistribute it and/or modify
   - it under the terms of the GNU General Public License version 3 as
   - published by the Free Software Foundation.
   -
@@ skipping 193 matching lines @@
     <button id="screenshotMarkButton" type="radio" group="selectionType" oncommand="screenshotDataSource.selectionType = 'mark';" checked="true" label="&screenshot.mark.label;" accesskey="&screenshot.mark.accesskey;"/>
     <button id="screenshotRemoveButton" type="radio" group="selectionType" oncommand="screenshotDataSource.selectionType = 'remove';" label="&screenshot.remove.label;" accesskey="&screenshot.remove.accesskey;"/>
     <button id="screenshotUndoButton" oncommand="screenshotDataSource.undo();" disabled="true" label="&screenshot.undo.label;" accesskey="&screenshot.undo.accesskey;"/>
   </hbox>
   <vbox id="screenshotBox" flex="1">
     <canvas xmlns="http://www.w3.org/1999/xhtml" id="screenshotCanvas" onmousedown="screenshotDataSource.startSelection(event);" onmouseup="screenshotDataSource.stopSelection(event);" onmouseout="screenshotDataSource.stopSelection(event);" onmousemove="screenshotDataSource.updateSelection(event);"/>
   </vbox>
 </wizardpage>
 
 <wizardpage id="commentPage" pageid="comment" next="send" label="&commentPage.heading;" onpageshow="initCommentPage();">
-  <description>&commentPage.description;</description>
+  <description>&emailComment.label;</description>
+  <hbox class="topLabel" align="baseline">
+    <label id="emailLabel" control="email" value="&email.label;" accesskey="&email.accesskey;"/>
+    <textbox id="email" persist="value" flex="1" maxlength="200" oninput="updateEmail();"/>
+  </hbox>
+  <checkbox id="anonymousCheckbox" label="&anonymous.label;" accesskey="&anonymous.accesskey;" oncommand="updateEmail();"/>
+  <description id="anonymityWarning" visible="false">&anonymity.warning;</description>
 
+  <description class="topLabel">&commentPage.description;</description>
   <label class="topLabel" control="comment" value="&comment.label;" accesskey="&comment.accesskey;"/>
   <textbox id="comment" multiline="true" flex="1" oninput="updateComment();"/>
-  <hbox align="baseline">
-    <label control="email" value="&email.label;" accesskey="&email.accesskey;"/>
-    <textbox id="email" flex="1" maxlength="200" oninput="updateEmail();"/>
-  </hbox>
   <description id="commentLengthWarning" visible="false">&comment.lengthWarning;</description>
 
   <checkbox id="extensionsCheckbox" label="&attachExtensions.label;" accesskey="&attachExtensions.accesskey;" oncommand="updateExtensions(this.checked);"/>
 
   <deck id="dataDeck" selectedIndex="0" flex="2">
     <vbox pack="start">
       <label class="text-link" value="&showData.label;" onclick="showDataField();"/>
     </vbox>
     <vbox>
       <label control="data" value="&data.label;" accesskey="&data.accesskey;"/>
@@ skipping 16 matching lines @@
 
   <iframe id="result" type="content" flex="1" hidden="true" onclick="processLinkClick(event);"
           confirmationMessage="&sendPage.confirmation;" knownIssueMessage="&sendPage.knownIssue;"/>
 
   <hbox id="copyLinkBox" pack="end" hidden="true">
     <button id="copyLink" disabled="true" label="&copyLink.label;" accesskey="&copyLink.accesskey;" oncommand="copyLink(this.getAttribute('url'));"/>
   </hbox>
 </wizardpage>
 
 </wizard>