Rejected routes by interlocking or by system

[Skully]

We now have system rules preventing some train routes, which I think is currently a reasonable solution to prevent network clogs.

But we also have routes which are rejected by interlocking but in actuality are rejected by system rules.

Or requiring D to be set before E2 can be set at Będzin.

For this one I would expect: "[System] The route from E2 requires D to be set."

So in order to be consistent I would like to see all routes which can be enabled IRL but rejected by system rules to give a clear yellow warning prior to cancelling. Same as we have with bad train routes.