Fixed T29139 - Fixed warnings when creating a 4D statistic with a 3D mask (wrong time mapping)
Summary:
- fixed the correct mapping of time point to time step of mask
- Avoid cloning of images in Mask generator
- Improved const correctness and const support in some statistic classes
Test Plan: code review, unit test, test of workbench (see instruction of T29139)
Reviewers: O3 MITK Reviewer Group II, O1 MITK Reviewer Group I, kislinsk
Reviewed By: O3 MITK Reviewer Group II, O1 MITK Reviewer Group I, kislinsk
Subscribers: kislinsk
Differential Revision: https://phabricator.mitk.org/D647