Fix for 40728. Remove struct phrases from pref ui. r=mscott.

mailnews/base/prefs/resources/content/pref-viewing_messages.xul

@@ -15,7 +15,7 @@
 
   <script language="javascript">
   <![CDATA[
-    _elementIDs = ["mailFixedWidthMessages", "mailQuotedStyle", "mailQuotedSize", "wrapLongLines", "displayGlyph", "displayStruct", "mailCitationColor", "sendDefaultCharsetList", "forceCharsetOverride"];
+    _elementIDs = ["mailFixedWidthMessages", "mailQuotedStyle", "mailQuotedSize", "wrapLongLines", "displayGlyph", "mailCitationColor", "sendDefaultCharsetList", "forceCharsetOverride"];
 
     function Startup()
     {
@@ -115,9 +115,6 @@
       <checkbox class="iconic" id="displayGlyph" value="&convertEmoticons.label;" accesskey="&convertEmoticons.accesskey;"
                 pref="true" preftype="bool" prefstring="mail.display_glyph"
                 prefattribute="checked" tooltip="aTooltip" tooltiptext="&convertEmoticons.tooltip;"/>		
-      <checkbox id="displayStruct" value="&convertStructs.label;" accesskey="&convertStructs.accesskey;" 
-                pref="true" preftype="bool" prefstring="mail.display_struct"
-                prefattribute="checked" tooltip="aTooltip" tooltiptext="&convertStructs.tooltip;"/>
     </box>
   </titledbox>
 

mailnews/base/prefs/resources/locale/en-US/pref-viewing_messages.dtd

@@ -54,11 +54,8 @@ Rights Reserved.
 <!-- LOCALIZATION NOTE : (emoticonsAndStructs.label) 'Emoticons' are also known as 'Smileys', e.g. :-)   -->
 <!ENTITY convertEmoticons.label           "Display emoticons as graphics.">
 <!ENTITY convertEmoticons.accesskey       "c">
-<!ENTITY convertStructs.label             "Display structured phrases as HTML styles.">
-<!ENTITY convertStructs.accesskey         "s">
 
 <!-- Tooltips  -->  
 <!ENTITY convertEmoticons.tooltip "Convert Emoticons">  
-<!ENTITY convertStructs.tooltip "Convert Structs">