Add or move a warning regarding a failure to resolve space for marker

[angiehjort]

there is a warning right after, but the code won't reach there because this line will crash and burn when space is null

https://github.com/vizabi/vizabi-reactive/blob/5e6fa9f3d4d0a464e1447bd928efa972aa48a9ca/src/core/dataConfig/dataConfig.js#L133

[jheeffer]

Need to add tests to dataConfig/solver for how it fails on bad configs or impossible solver configuration.