Color class promoted from WbKernel to Kernel
          Reason for change
          Seaside needs to be able to access the Color class to provide HTML color tags, possibly in a headless image. This class was only available when the WbKernel application (part of WindowBuilder Pro – Runtime) was loaded and when the CommonGraphics GUI Framework was available.
          Change
          •	The Color class is moved to the base with all its original behavior than is not dependent on a GUI framework.
          •	The CgRGBColor class is made a subclass of Color to provide behavior based on having a GUI framework available.
          •	All previous WbKernel extensions to Color that depend on having a GUI framework are moved to CgRGBColor.
          •	Instances of Color support RGB color intensities of 0 – 255.
          Action required
          Change any Color references in your applications that provide values to a GUI framework to CgRGBColor.
         
        
          Last modified date: 07/02/2019