Option to initialize new boards with default buttons

[twiclo]

In most use cases I've seen the user will have a home board and sub-boards. All of these sub-boards will have a back button to get back to the previous board and some sub-boards have sub-boards. It would be nice if you could set up a default "back" and "home" button when creating a new board. I'm pretty sure the new board has no concept of the previous board but maybe that can be accomplished by looking at the last board the user got before creating a new board