feat: pass event on node-click

[joelcoxokc]

I have my own extension for this, but it is going to be much easier and more maintainable if this code resides in the primary repo.
Can you please allow this code to be added, This should not be considered a breaking change.

[joelcoxokc]

I basically have multiple buttons on the node... And adding click events to each button does not work properly.
Also with the amount of data I am displaying, having 5 click events per node is a little too much on the browser.
So I need access to the event object to detect which target element was clicked.

I also need access to the position of the click event to display some popovers

[bumbeishvili]

Makes sense, I'll merge and update the version on the first chance