Creating Mecanim transitions with new automatic settings

When creating a new transition with Mecanim/Animator the automatic transition settings are set as such:



I would like to make some of those settings be false or 0, I found the way to do that but I have to click on a button to clean up all the transitions in an Animator.
Now I hope to take it a step further and change those settings as soon as I create the transition (it would be like having my personal defaults settings). Is there some kind of event that I can listen to that gets called on the creation of transitions in Mecanim?