Add user manual for the generic datafit view.
Summary: Add user manual for the generic datafit view.
Test Plan: Manually
Reviewers: floca, O3 MITK Reviewer Group II, s434n
Reviewed By: O3 MITK Reviewer Group II, s434n
Subscribers: s434n
Maniphest Tasks: T27745
Differential Revision: https://phabricator.mitk.org/D603