Support Commands & POGOs in f:all

[robfletcher]

Currently f:all uses persistent properties to determine the fields to render. There could be an alternate path using reflection for non-domain types.

[goeh]

I just want to confirm/clarify that f:with and f:field works great with command objects. If f:all also could works with command objects (with constraints) it would be great.

[jbowen7]

Also note that the documentation is incorrect or at least misleading: "In the simplest case you can use f:all to render a field for every property of a bean (the domain object or command the form will bind to): "

[snimavat]

Duplicate of https://github.com/grails-fields-plugin/grails-fields/issues/115