Provide a recommendation for autocompletes #349

There's currently competing components for autocompletes, it'd be good to offer one recommendation.

We currently have:

<f:entry title="U.S. State" field="state">
 <f:textbox />
</f:entry>

<f:entry title="U.S. State" field="state">
 <f:combobox />
</f:entry>

Current thinking is:

1. Move combobox to select with a searchable parameter
2. Searchable select needs to be able to be filtered on the server side
3. Consider adding ability to have "name, display name" options for autocomplete so that whats displayed in autocomplete doesn't have to be the selected value.
4. (nice to have) Customise-able item templates for searchable select and auto complete