Minimal invasive fix/workarround for T24886

Summary:
In context of T24962 the widget should be properly refactored and cleaned up as well.

Signed-off-by: Ralf Floca <r.floca@dkfz-heidelberg.de>

Removed dead (commented out) code

No need to keep it rotten in the master.
We use vcs to document old versions of code.

Signed-off-by: Ralf Floca <r.floca@dkfz-heidelberg.de>

Test Plan: Review

Reviewers: O1 MITK Core!

Maniphest Tasks: T24886

Differential Revision: https://phabricator.mitk.org/D140