Basis vector preview

[yashton]

The current layout configuration uses "Right" and "Upper Right". This is confusing, particularly given that "Upper Right" is towards the bottom right of the screen. There are a wide variety of basis vector notations used in the literature and by different groups.

Create a new input which shows all six directions and allows each direction to be changed. Show a preview of the interval name based off the scale . Allow changing orientation from vertical (i.e. a flat side of the hexagon is parallel to the y-axis) or horizontal (i.e. a flat side of the hexagon is parallel to the x-axis). Allow rotating the orientation of the basic vector relative to the coordinate space.