-RM-398-MR-[NavigationSlices] Threadunsafe - crash
When switching fast between datasets (e.g. given by Colormapper module) the NavigationSlices module may crash. Ways to reproduce: Take a module for fast texture generation and attach a Colormapper instance to it. When now fastly switching between textures, the Navigation slices might crash.
(from redmine: created on 2015-08-11)