onNodeClick should trigger a draw call after executing the user provided callback #587

Is your feature request related to a problem? Please describe.
At the moment, it's not possible to simply update the way a node is drawn when it's clicked. This impacts applications which implement a node selection routine, where the graph stays exactly the same. The current solution is to switch off autoPauseRedraw which is very wasteful and rather a workaround.

Describe the solution you'd like
The library should either implicitly or explicitly call the render function after the 'onNodeClick' callback is executed.