Allow loading a route with no ways as members or at least fail gracefully

[HellMapGoesCoding]

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I created a new route to try and fill it out with Relatify, but upon attempting to load it, I got a generic 500 Internal server error message. I assumed it was because I had no ways as members of the route, so I added a way and then it loaded fine. If it's not intended to load such routes, it would at least be great to have a corresponding error message.

[Zaczero]

I believe this issue will be resolved once the creation mode is added to Relatify. Currently, it requires at least one way to be present in order to locate the edit area and display adjacent roads.

[JesseWeinstein]

Also note that there is a slight delay between creating a relation and being able to load it; presumably it's the underlying delay of Overpass?

[Zaczero]

Also note that there is a slight delay between creating a relation and being able to load it; presumably it's the underlying delay of Overpass?

Yes