Edges in compound nodes don't animate properly

[nikosai]

When I set infinite: true and fit: false, edges in compound nodes don't animate properly.

To reproduce

In demo-compound.html, simply change the layout option as below:

layout: {
  name: 'cola',
  infinite: true,
  fit: false
},

[Max Franz]

See cytoscape/cytoscape.js#2440