Displaying the preview should not change the current conversation context

The following scenario highlights the bug:

• Navigate to a folder with File documents
• Right Click on a File
• Select "Preview" from the Context Menu. Preview Window is opened.
• Close the Preview Window
• Now, sort the folder content (by "Title" for instance)
  => Summary page of previewed file is shown instead of sorting the files by title in the folder.

This bug occurs because the preview uses the current conversation and change its context (navigation to the File)