Do not use and overwrite public labels for appearance status

[bonndan]

The labels Label.icon, Label.fill, Label.color are overwritten by the AppearanceProcessor. Changes would appear in the changelog and also user input would be overwritten.

• color can be set by appearance processor if null / empty
• icon and fill must not be overwritten. Instead introduce labels "renderedIcon" and "renderedFill".
• check if getIcon() should remain in the component interface
• use rendered* in svg/map generation
• make sure the changes do not appear in the changelog