Fallback to `select` if array of `checkboxes` fail

Allows fields that are arrays of strings to be passed to `<select multiple>`
inputs.
> Is
> 
> if
>   # ...
> else
>   # ...
> rescue
>   # ...
> end
> valid ruby?

It is if you start with def:

```
def foo
  if ...
  else ...
  end
rescue
end