Extrude Vertices Redux:
...This is not good enough. We should be able to extrude the vertices in or out by a distance, as dragging a corner of a selection of vertices would not result in a consistent distance where a shape is bidirectional (L shaped) and rotated. For example, this method would expand a shape along a rotated plane by a defined distance from each vertex, along a direction in-or-out averaged by the perpendicularity of two lines in the desired plane of expansion (ignoring any other lines not in the plane).
Actually, this is nothing but a Bevel with negative numbers and zero Out but along a virtual axis. I should've spotted it instantly.
