nnUNet tool Confirm button should be deactived before Preview is pressed (bugfix)
Summary: The Bug (T29224) was introduced due to the imcomplete adaptation of Segementation tool GUI API changes made as part of T29185.
Test Plan: NA
Reviewers: kislinsk, O1 MITK Reviewer Group I
Reviewed By: kislinsk, O1 MITK Reviewer Group I
Subscribers: floca
Differential Revision: https://phabricator.mitk.org/D681