Give more realistic example address data

Posit that examples of where you can put different parts of the address
is more helpful than ‘example, example, example’. Also shows that you
don’t have to fill all of the address columns.

Spot the Easter egg 🎅

app/templates/views/send-test.html

@@ -51,7 +51,7 @@
     ) %}
       {% for column in item %}
         {% call field() %}
-          {% if loop.index > 1 %}
+          {% if loop.index > 1 or template.template_type == 'letter' %}
             <label class="visuallyhidden" for="placeholder-field-{{ loop.index }}">{{ column }}</label>
             <input class="form-control form-control-1-1 " data-module="" name="{{ column }}" rows="8" type="text" value="" id="placeholder-field-{{ loop.index }}">
           {% else %}