Better, semantic simple_form patterns

[ajb]

From @jrubenoff on February 10, 2016 17:42

Problem

Both of the labels here are label elements:

This isn't correct.

• It's not semantic. You can't have two labels for an input.
• It decreases usability. It's a label, so the browser gives you a pointer cursor on hover. But there's no for attribute, so nothing happens when you click on it.

  Solution

Add some better markup patterns to simple_form. A few examples:

Copied from original issue: dobtco/screendoor-v2#3191