Added OverwriteStyle modes to TransferLabelContent
Summary:
+ Added OverwriteStyle modes to TransferLabelContent
+ Fixed T29177
+ Added Unittest for TransferLabelContent
+ removed unused variables
Test Plan: code review, unit tests
Reviewers: O1 MITK Reviewer Group I, kislinsk
Reviewed By: O1 MITK Reviewer Group I, kislinsk
Subscribers: kislinsk
Maniphest Tasks: T29177
Differential Revision: https://phabricator.mitk.org/D648