Wireframe on/off

[haesleinhuepf]

It would be cool to have a Tools menu entry for turning on/off the wireframe of the current surface layer.

What do you think @jo-mueller ?

[jo-mueller]

@haesleinhuepf good idea, shouldn't be that hard - the function could look something like this:

def toggle_wireframe(layer: "napari.layers.Surface", viewer: 'napari.Viewer') -> None:
  viewer.layers[layer.name].wireframe.visible = True
  return None