O16: preselect "enter a single address" radio button

Author: klssmith

app/main/views/send.py

@@ -562,6 +562,9 @@ def render_email_add_recipients(service_id, template_id, template, placeholders)
 
     form = AddRecipientForm()
 
+    if request.method == "GET":
+        form.add_recipient_method.data = AddRecipientForm.CHOICE_ENTER_SINGLE_EMAIL
+
     if form.validate_on_submit():
         choice = form.add_recipient_method.data