World Editor Materials

So with the old world editor when ever I used to have a no material I used to be able to easily fix it no problem because I was able to go to the material in the Material Editor, delete it and re export my object and it would turn white and I could just apply it.
Now with the new World Editor I cant do that i can no longer search or see the part or object that is no material and i cant fix it. Is there any possible chance that the old feature can be implemented into this one or is there a new way to fix it can someone please let me know!?

 

It definitely was a feature in the old Editor not a glitch it’s just how it worked because I export it with a material in blender then beam will show it as no material then I’d be able to go to the material in beam in the basic properties where that American flag was in the old one had just like a white box now if you have no material the material doesn’t show at all anymore if I had the old editor I’d have an example