[Feature Request] Add front end rendering support for non latin based scripts

[KevinKaChunLee]

When rending nodes with labels not in latin based scripts, the node is rendered as ???

Example Code:

 vancouver = gb.GraphNode(id='vancouver', label='温哥华', namespace='Canada') 
 self.graph.nodes.extend([vancouver])

[pkgoogle]

This is pretty clear, we will look into this.