How Many Blocks to Fill a Cube?

We fixed a bug in the 3D and Orthographic Views Gizmo. Previously the Gizmo did not state the minimum number of blocks required to complete two of its "games" correctly. When the object of the game is to fill the top view, the left view, and the front view completely, the Gizmo stated that twenty-eight blocks were required, whereas the game can be completed with only sixteen. The Gizmo stated that another game required seventeen blocks, where in fact it too can be completed with sixteen. The Gizmo now states the correct minimum number of blocks. Thanks to a student in Virginia for showing that the "filled" game can be completed with less than twenty-eight, and thanks to P.H. for showing that it can be completed with sixteen!