Contact List View Call button modification of function

I am trying to learn to modify SuiteCRM to my needs, I understand basic editing of the files.

I want the call action button that is to the right of a contact list view to open the call record in a new tab and not in the same window, i cant figure out how to do this. I have looked through the contacts module files and views and just cant figure this out. please help it does not seem like it should be this difficult.