I am customizing the simple theme into my own theme. and I would liike to make the nav menu in the header extend from column 1 to last column (page width).
I am not exactly clear how to do this and would appreciate some insight.
This isn't so much a SilverStripe issue, more of a css thing. But it seems like setting the width of the <ul> in templates/Includes/Navigation.ss to 100% seems to do the trick. Just a hunch, didn't test it any further then Firefox... Maybe take it from there :)