Object Docker: Bring back the possibilty of changing the color of the layername with the color of the layer

In older Versions the color of the layer is equal to the color of the layername. In the newer Versions there is onle the small stripe on the right side which shows the layercolor.
If you have a greater amount of layers this option was very usefull.
i suggest to activate this feature in the options menue of the object docker