Control Highlight settings in individual map layer overrides

There are several other posts asking for more fine grained control over the highlight color and transparency, but I would add on that we should be able to set up different highlight colors for each map layer. 

For example, the layers within WasteWater could have a green highlight color, Water layers in blue, Non-Potable layers in purple, etc. 

This could potentially be done in the Overrides section of the Layer Extensions.