Optimization of the mxnmultiwidget

Summary:
move slider navigation to QtWidgets

add utility widget at the top of MxN render windows

correctly set render window properties of nodes

move view direction selection from context menu to utility widget

Replace view direction in newly introduced class

The class was created before the "Frontal" view direction
was changed to "Coronal".

Clean render window utility widget

Remove unnecessary parameters, which can be retrieved from the
passed QmitkRenderWindow.
The widget name was not used at all.

Add slice navigation inversion check

Completely remove RenderWindowManager Module

Add simple context menu for the data storage inspector

The contex menu allows to reinit the specific renderer to a
selected data node or reinit the renderer's world geometry to
the image geometry of the selected data node.

Test Plan: manual testing of the mxnmultiwidget and its render windows

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

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

Subscribers: kalali, s434n, floca

Maniphest Tasks: T28578

Differential Revision: https://phabricator.mitk.org/D726