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
Changed code to use log Info
Changed code to append error messages rather than replace text
Added/Changed code to use Log4Net.
Changed logic for Updates to Use IDs rather than Objects for internal Updates
Added a FormatColumn token to handle DTS, Added comments to describe tokens
Added methods ParentRefU and ParentRefU2 to support otther changes