Fix wrong view initialization when creating a new segmentation node

Summary:
Remove re-initialization from QmitkAbstractView

The functionality will be moved to the IRenderWindowPart to
differentiate between different render window editors.

Provide function to re-initialize the views of a render window part

This function needs to be implemented individually
for each multi widget.

Provide function for StdMultiWidget view initialization

Provide function for MxNMultiWidget view initialization

Test Plan:

1. open MITK workbench, load an image
2. load two images
3. reinit one image, create a segmentation for the second
4. see how the render windows are initialized
5. close Standard Display, open mxn display
6. add more render windows
7. reinit render windows to different images
8. create a segmentation
9. only the active render window is initialized

Reviewers: floca, s434n, O1 MITK Reviewer Group I, O3 MITK Reviewer Group II

Reviewed By: floca, O1 MITK Reviewer Group I, O3 MITK Reviewer Group II

Subscribers: s434n, floca, kalali

Maniphest Tasks: T29328

Differential Revision: https://phabricator.mitk.org/D729