T30400-Fix_multi_label_thumbnail
Summary: + fixed T30400 + multi label thumbnail now uses label colors
Test Plan: code review, UI test: select images and segmentations and check for correct thumbnail in selection widget
Reviewers: O3 MITK Reviewer Group II, kislinsk
Reviewed By: O3 MITK Reviewer Group II, kislinsk
Maniphest Tasks: T30400
Differential Revision: https://phabricator.mitk.org/D932