Primenotes

Looks nice! Did you build this with the current row API? It will be interesting to see if groups can be added and how features interact with tree rows. Would...

> Hello, The problem here is that the columns strokes are in fact a background-image. So it seems possible to make a pattern since I managed to add coloured columns...

I think its better to use existing taskStore and display tasks as milestones depending on a condition (e.g. isMilestone: boolean). Other thoughts about that?