Pull up material disposal to MeshBase.

Assets/Cryville/Crtr/Components/SpriteText.cs

@@ -86,6 +86,7 @@ namespace Cryville.Crtr.Components {
 					var m = new MeshWrapper();
 					m.Init(mesh.MeshTransform);
 					m.Mesh = new Mesh();
+					m.Renderer.material = MeshWrapper.NewMaterial(); // TODO Destroy or add to `materials`
 					m.Renderer.material.mainTexture = tex;
 					meshes.Add(tex, m);
 					verts.Add(tex, new List<Vector3>());