Allow select options to display different string than value

[regisphilibert]

Currently the list of optoins is a slice of strings:

  options:
  - Alabama
  - California

will produce

<select name="test">
  <option value="Alabama">Alabama</option>
  <option value="California">California</option>
</select>

We need to spec up a UX so user can have something like this:

<select name="test">
  <option value="AL">Alabama</option>
  <option value="CA">California</option>
</select>

Golang order map keys by alpha, preventing user from imposing an order so

options:
  al: Alabaa
  ca: California

is out of the question.

We could use comma separated strings

options:
  - 'al: Alabama'
  - 'ca: California'

But this means, no option text could ever contain semi columns...