Tidy up ‘change service name’ page

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

app/main/forms.py

@@ -168,7 +168,7 @@ class ServiceNameForm(Form):
         super(ServiceNameForm, self).__init__(*args, **kwargs)
 
     name = StringField(
-        u'New name',
+        u'Service name',
         validators=[
             DataRequired(message='Can’t be empty')
         ])