Update underlying data field when related object is updated.

If the selected Library Document is out-of-range throw a specific error
Don't fail if the user clicks on open space in the BookMark list
Added property to provide a right margin (RTBMargin) between the RichTextBox and the StepItem

PROMS/VEPROMS.CSLA.Library/Generated/Association.cs

@@ -145,6 +145,7 @@ namespace VEPROMS.CSLA.Library
 				if (_MyDocVersion != value)
 				{
 					_MyDocVersion = value;
+					_VersionID = value.VersionID;// Update underlying data field
 					PropertyHasChanged();
 				}
 			}
@@ -177,6 +178,7 @@ namespace VEPROMS.CSLA.Library
 				if (_MyROFst != value)
 				{
 					_MyROFst = value;
+					_ROFstID = value.ROFstID;// Update underlying data field
 					PropertyHasChanged();
 				}
 			}