Creates a new Helper from a template object.
Same as Primitive Maker, but for helpers.
Use Helper def Wirecolor option: when checked, all helpers of the new type will use the default color for helpers as specified in the Customize User Interface dialog. Otherwise, each helper object's wirecolor can be changed through the color swatch.
v. 1.1: fixed a major bug that prevented cloning correctly (thanks to gramx for finding it).