Add a way to display the metadata of an object in the inspector

[bvaisman-GitHub]

I think it could be great to have a button in the inspector which displays the metadata of the clicked mesh. The metadata shoud be displayed in a beautiful way such as stringify(mymetadata,null,4)

Thanks in advance to the team.

Boris

Link to the discussion in the forum : https://forum.babylonjs.com/t/read-write-metadata-using-the-inspector/34208/6