Tidy up ‘change service name’ page

- Make service name repopulate in textbox
- More spacing between sections of the page

app/templates/views/service-settings/name.html

@@ -13,12 +13,13 @@
   <div class="grid-row">
     <div class="column-three-quarters">
 
-      <p>Users will see your service name:</p>
-
-      <ul class="list-bullet">
-        <li>at the start of every text message, eg ‘Vehicle tax: we received your payment, thank you’</li>
-        <li>as your email sender name</li>
-      </ul>
+      <div class="form-group">
+        <p>Users will see your service name:</p>
+        <ul class="list-bullet">
+          <li>at the start of every text message, eg ‘Vehicle tax: we received your payment, thank you’</li>
+          <li>as your email sender name</li>
+        </ul>
+      </div>
 
       <form method="post">
         {{ textbox(form.name) }}