Remove old axes helper

[martinRenou]

Now that we have a nice and interactive axes helper #440 we should get rid of the old axes helper and the associated toolbar button from the codebase

[trungleduc]

I think the old axes helper is not only about controlling the camera like the view helper. It also helps positioning the object in its coordinate space.

[martinRenou]

Ok, so would you be up for keeping it?

[trungleduc]

yes, it facilitates setting the placement

[martinRenou]

Ok then let's keep it! Thanks for your comment