Bug: Editor can't render ScalableProp with undefined size

[XenonA7]

Some vanilla maps use scalable props with undefined size. Inside heat-dng/f2/room-cold, there are scalable props called waterfallLong from the heat-dng sheet that do not have a defined size. The map editor doesn't render these at all, thus there is no way to interact with them without blindly doing it in the json.

Another example of this are the sandLine props from the heat-dng sheet. These can be found in heat-dng/g/room-09.

A workaround is to manually define a prop in the JSON which includes a value for size. These will work and show up in the editor, but vanilla props will not.