Add a 'Trafic Light' 'RAG' Color Indicator Deal Property

This seems to me like a simple change that would have massive impact for displaying customer health (helping to position HuBSpot against the likes of Gainsight), contract status (highlighting contracts at risk of loss), deal prioritisation etc etc. The list is endless. I’ve seen it in the likes of Smatsheets (and Excel) - so I think it must be strightforward to do.