For fileter editing, escape the created file name before using it as URI,

bug 130352, r=naving, sr=bienvenu, a=asa, adt.

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

@@ -503,7 +503,7 @@ function SearchNewFolderOkCallback(name,uri)
   
   if (!imapFolder)
   {
-    var curFolder = uri+"/"+name;
+    var curFolder = uri+"/"+escape(name);
     SetFolderPicker(curFolder, gActionTargetElement.id);
   }
 }