work for #169638. spam UI. add the ability to search by junk status to the advanced search UI. r/sr=mscott

mailnews/base/search/resources/content/searchTermOverlay.js

@@ -526,9 +526,9 @@ function GetLabelStrings()
   if (!gLabelStrings.length)
   {
     var prefString;
+    var pref = Components.classes["@mozilla.org/preferences-service;1"].getService(Components.interfaces.nsIPrefBranch);
     for (var index = 0; index < 6; index++)
     {
-      var pref = Components.classes["@mozilla.org/preferences-service;1"].getService(Components.interfaces.nsIPrefBranch);
       prefString = pref.getComplexValue("mailnews.labels.description." + index,  Components.interfaces.nsIPrefLocalizedString);
       gLabelStrings[index] = prefString;
     }

mailnews/base/search/resources/locale/en-US/search-attributes.properties

@@ -47,7 +47,7 @@
 43=reserved for AB
 44=reserved for AB
 45=reserved for AB
-46=reserved for AB
+46=Junk Status
 47=Sender 
 48=Label
 # don't use above 49

mailnews/public/MailNewsTypes2.idl

@@ -42,6 +42,8 @@ typedef long nsMsgSearchScopeValue;
 
 typedef long nsMsgPriorityValue;
 
+typedef unsigned long nsMsgJunkStatus;
+
 [scriptable, uuid(94C0D8D8-2045-11d3-8A8F-0060B0FC04D2)]
 interface nsMsgPriority {
     const nsMsgPriorityValue notSet = 0;