Update of Viewing Data to 5.1, integrating Web and Insight

Also moved to Workflow section in menu.
@hflynn 
Pushed to allow review of text.
Screenshots may need updating if there are any further changes to UI before release.
Need to check this just prior to release.
Also need to update Downloads staging with new PDF as soon as ready for release.

To test - read and proof.
PDF download from page will be of current active version, not updated version.
'Click Save to save the rendering setting as yours' reads fine but then does it need an 'and' before the next bit of the sentence? Also 'thubnail' typo.