Fix buggy runtime.runtime code when fetching runtimes from Flowhub registry

Fixes new project and new graph not showing available runtimes.
Unclear why this worked before, possibly because old pre-fluxify persistence
normalized the objects and never exposed the buggy entries outside noflo-main.
Note: may need to clean out IndexDB as some objects with { runtime: RealInfo, options: }
may have been stored
References #324