Paused Deformable's have their mesh data reset when entering play mode

[keenanwoodall]

You should be able to pause deformables and not have to update them again when entering play mode. This is a bit tough, because native arrays have to be disposed when changing between edit and play mode. A possible solution would be to serialize MeshData.dynamicManaged and copy that into MeshData.DynamicNative when initialized, but that would counteract any attempts at solving the mesh serialization issues (#10) and would bloat scene sizes even more.