Unsupported/untested qt version is now a warning, not a cmake error
Unsupported/untested qt version is now a warning, not a cmake error

Summary: see commit comment

Test Plan: tested manually

Reviewers: O1 MITK Reviewer Group I, kislinsk

Reviewed By: O1 MITK Reviewer Group I, kislinsk

Maniphest Tasks: T26721

Differential Revision: https://phabricator.mitk.org/D325

MITK/MITK,MITK/MITK,MITK/MITK,MITK/MITK,MITK/MITK,MITK/MITK