Enhanced Document support

Null check
Move DisplayText.cs to CSLA
Enhanced Documents – don’t allow ‘Save’ RO on enhanced step
Enhanced Documents windowing
Enhanced Documents remove unnecessary options
Enhanced Documents – don’t allow ‘Save’ transition on enhanced step
Enhanced Documents/Insert,Delete,Paste

PROMS/VEPROMS.CSLA.Library/Config/EnumDescConverter.cs

@@ -53,7 +53,8 @@ namespace DescriptiveEnum
     /// <returns>The description, if any, else the passed name</returns>
     public static string GetEnumDescription(System.Type value, string name)
     {
-      FieldInfo fi= value.GetField(name); 
+      FieldInfo fi= value.GetField(name);
+      if (fi == null) return "";   
       DescriptionAttribute[] attributes = 
         (DescriptionAttribute[])fi.GetCustomAttributes(
         typeof(DescriptionAttribute), false);