Add a green checkmark on a pinned mission when flow is good (instead display at the end of the belt/vortex
More information : the checkmark must be effective only if the flow is connected to vortex. When i build, i ask to myself “is my flow ok ?”, then i focus on vortex, i check if i have a green check mark, then come back to my factory. With a checkmark on a pinned mission, it is a manner to have an answer “I do not know if your factory is efficient, but your proposal is good”