No event for editing a circuit element/vertex

[samreid]

From https://github.com/phetsims/phet-io/issues/807

When clicking on a circuit element, the only thing that remotely signifies that this has happened is this event (number 332):

But this is not truly representative of editing a circuit. It's also unreliable, if the value of whatever you are editing is already 100 units, then you do not get that event (since I guess the text is always "100" when hidden):

For phetsims/tasks/issues/718.

[samreid]

On hold until we get to phet-io for this sim.