Enhance and test InstanceData on all platforms

[RedImp1470]

see #451

Manual Tests: Scenario: two SceneNodes containing the same Mesh and a InstanceData each. While rendering:

• [ ] Replace InstanceData Need to observe the SceneNode / Components? (MeshManager needs to dispose the old one and replace the entry in the _identifierToInstanceDataImpDictionary. See MeshManager.GetImpFromInstanceData)
• [ ] Replace Mesh Need to observe the SceneNode / Components? (InstanceDataImp contains a reference to the VAO of the mesh)

Change InstanceData Colors

• [ ] Android - blocked by #515

Change InstanceData Transforms

• [ ] Android - blocked by #515