BUG: Fixed labelmap selector in Editor
It was not possible to select any other labelmap than the default.
For example:
- Download MRHead sample
- Go to Editor module, click apply in the colormap selector
- Click "Set..." button to set another labelmap
- Click "Create new...", click apply in the colormap selector => ERROR: still the old labelmap is selected
- Click "Set..." button to set another labelmap
- Select the new labelmap => ERROR: still the old labelmap is selected