Replace ‘send a batch’ with ‘send from a CSV file’

This is better. Not done enough testing to know if it’s the best, but
let’s try it.

app/templates/views/choose-template.html

@@ -77,7 +77,7 @@
         <div class="column-one-third">
           <div class="sms-message-use-links">
             {% if current_user.has_permissions(permissions=['send_texts', 'send_emails', 'send_letters']) %}
-              <a href="{{ url_for(".send_messages", service_id=service_id, template_id=template.id) }}">Send a batch</a>
+              <a href="{{ url_for(".send_messages", service_id=service_id, template_id=template.id) }}">Send from a CSV file</a>
               <a href="{{ url_for(".send_message_to_self", service_id=service_id, template_id=template.id) }}">Send yourself a test</a>
             {% endif %}
             {% if current_user.has_permissions(permissions=['manage_api_keys']) %}

app/templates/views/send.html

@@ -11,7 +11,7 @@
 
 {% block maincolumn_content %}
 
-  <h1 class="heading-large">Send a batch</h1>
+  <h1 class="heading-large">Send from a CSV file</h1>
 
   {% if 'sms' == template.template_type %}
     <div class="grid-row">
@@ -31,13 +31,14 @@
   <div class="grid-row">
     <div class="column-two-thirds">
       <p>
-        Add recipients by uploading a .csv file with
+        You need
         {{ template.placeholders|length + 1 }}
         {% if template.placeholders %}
-          columns:
+          columns
         {% else %}
-          column:
+          column
         {% endif %}
+        in your file:
       </p>
       <p class="bottom-gutter-2-3">
         <span class='placeholder'>{{ recipient_column }}</span>