add a copyright-div

I want to add a copyright in my plugin. The problem now is that I can not assume that even a copyright has been added with the copyright Event. Even so I do not know if a distance has already been added to the top (```marginTop```), because only the first Copyright should have a distance to the top. So if I suspect that my plugin has been installed in the dummy app without copyright, I have to add the class ```marginTop```. But if I suspect that my plugin is installed together with the board, I can not add a the class. The element (the div) solves the problem.