Fix crash in message composer because of stranded Insert Character dialog, b=117791, r=duccaroz, sr=dveditz

mailnews/compose/resources/content/MsgComposeCommands.js

@@ -191,8 +191,9 @@ var gComposeRecyclingListener = {
     document.getElementById("format_auto").setAttribute("checked", "true");
     document.getElementById("priority_normal").setAttribute("checked", "true");
 
-    //Reset editor attributes
+    //Reset editor
     EditorResetFontAndColorAttributes();
+    EditorCleanup();
 
     //Release the nsIMsgComposeParams object
     if (window.arguments && window.arguments[0])
@@ -1424,6 +1425,9 @@ function ComposeLoad()
 function ComposeUnload()
 {
   dump("\nComposeUnload from XUL\n");
+
+  EditorCleanup();
+
   RemoveMessageComposeOfflineObserver();
   RemoveDirectoryServerObserver(null);
   if (gCurrentIdentity)

mailnews/compose/resources/content/messengercompose.xul

@@ -52,6 +52,7 @@
         onunload="ComposeUnload()"
         onload="ComposeLoad()"
         onclose="return DoCommandClose()"
+        onfocus="EditorOnFocus()"
         title="&msgComposeWindow.title;"
         windowtype="msgcompose"
         width="640" height="480"