### canonicalize_radical for matrices.

The following all works

```
sage: a = sqrt(2)*sqrt(3)*sqrt(6)
sage: v = vector([a])
sage: M = Matrix([v, v])
sage: a.canonicalize_radical()
6
sage: v.canonicalize_radical()
(6)
```

However the following doesn't work:

```
sage: M = Matrix([v, v])
sage: M.canonicalize_radical()
```

EDIT: Could ~~I request, as a feature, ~~somebody please tell me the ~~"vectorization" ~~right place to ask for "vectorization of canonicalize_radical for ~~matrices?~~matrices" as a new feature of sage?