coerce shape of an Array

[lheagy]

I have an array that internally, I would like to treat it as a vector with shape (3,), but I would like to allow the user to input something that is (3,1). I realize this could be achieved with a validator, but this case comes up quite a bit (and is easy to forget about). Without a validator, the user will get the error

Would it make sense to add a coerce_shape=True keyword to the Array property (eg. it tries to flatten a 1D array to a vector if the shape is ('*',) or, alternatively, if a 2D array was expected and a vector input, it performs a np.atleast_2d on it?