Suggest to the client that neurons can be clicked on

_When hovering over a cell, make it pop out to show that the cord is interactive._

What they mean here is that when the used hover over a neuron they do not know that they click on it and that this would open the tabs on the right with all the information. They are asking for a way to make it more obvious to the user that they can click on a neuron and that something will happen. We do no not need to implement exactly the 'pop out' that they ask but something that hints at the user that there is an interaction with the application. @syamace-metacell thought? cc @afonsobspinto @zsinnema