Add "after" facet to inputs

[NicolaIsotta]

It would be useful to have an "after" facet in all the components who generate a form-group. The contents of this facet (for example, a <b:message/> or an help-block) should be rendered inside the form-group, but after the input/select/input-group.

[stephanrauh]

Would you mind to show us an example demonstrating your use case? We can add the facet, but the documentation looks nicer if we can explain why we added it :).

[stephanrauh]

related to #511.

[NicolaIsotta]

Actually, in my case, this is related to horizontal forms (#485) . I'd like to achieve a layout where error messages and/or description test can be shown next to an input.
Just an easy example taken from web:
http://i.stack.imgur.com/ToPRZ.png

[stephanrauh]

related to #614. In fact, #614 is the more general solution.

[stephanrauh]

Solved by #682 and #685.