-RM-343-MR-[FiberDisplay] Enabling colormapping works only when single coloring mode is active.
When enabling colormapping, the module should automatically switch to single-color mode.
Reproduce: Load fibers, add Fiber Display. Load scalar dataset for colormapping. Enable Colormapping in FiberDisplay. Expected: Fibers get colormapped Actual: Fibers still use the default fiber color scheme
(from redmine: created on 2014-03-26, closed on 2014-03-27)