I'm a little confused by the folder depth step sizes at the high end here.  I get that 0->1 has the same padding because we get our 2.2rem padding for the icons that we gain at dept1/depthnonzero.  I do not get why the deltas are {2: 1.5, 3: 1.5, 4: 0.5, 5: 2.5, max: 0.5}.  This wants a comment and/or to just be 1.5.