As a user i want to see the raw xml of an item in the reqif document

[samatstariongroup]

Prerequisites

• I have written a descriptive issue title
• I have verified that I am running the latest version of reqifviewer
• I have searched open and closed issues to ensure it has not already been reported

Description

pop a dialog that displays the raw XML of a selected item

Steps to Reproduce

NA

System Configuration

• ReqIFSharp version: 5.0.0-rc4
  • reqifviewer: 0.9.0