46274: Forgot to remove the structs pref from the |_elementIDs| list. Tnx to jrgm for the hint. r=ducarroz, a=waterson

mailnews/compose/prefs/resources/content/pref-composing_messages.xul

@@ -16,7 +16,7 @@
     
   <script language="JavaScript">
   <![CDATA[
-    var _elementIDs = ["forwardMessageMode", "autoQuote", "replyOnTop", "spellCheckBeforeSend", "sendStruct", "strictlyMime", "wrapLength", "sendDefaultCharsetList", "addressingAutocomplete"];
+    var _elementIDs = ["forwardMessageMode", "autoQuote", "replyOnTop", "spellCheckBeforeSend", "strictlyMime", "wrapLength", "sendDefaultCharsetList", "addressingAutocomplete"];
     
     function Startup()
     {