Refactor dashboard templates

Previously the structure was

```
dashboard.html
|_ today.html
   |_ some random html
   |_ a few things split into partials
```

This commit simplifies the structure to just be:

```
dashboard.html
|_ partial
|_ partial
|_ …
```

app/templates/views/dashboard/_totals.html

@@ -0,0 +1,25 @@
+{% from "components/big-number.html" import big_number_with_status %}
+{% from "components/message-count-label.html" import message_count_label %}
+
+<div class="column-half">
+  {{ big_number_with_status(
+    statistics.emails_requested,
+    message_count_label(statistics.emails_requested, 'email', suffix=''),
+    statistics.emails_failed,
+    statistics.get('emails_failure_rate', 0.0),
+    statistics.get('emails_failure_rate', 0)|float > 3,
+    failure_link=url_for(".view_notifications", service_id=current_service.id, message_type='email', status='failed'),
+    link=url_for(".view_notifications", service_id=current_service.id, message_type='email', status='sending,delivered,failed')
+  ) }}
+</div>
+<div class="column-half">
+  {{ big_number_with_status(
+    statistics.sms_requested,
+    message_count_label(statistics.sms_requested, 'sms', suffix=''),
+    statistics.sms_failed,
+    statistics.get('sms_failure_rate', 0.0),
+    statistics.get('sms_failure_rate', 0)|float > 3,
+    failure_link=url_for(".view_notifications", service_id=current_service.id, message_type='sms', status='failed'),
+    link=url_for(".view_notifications", service_id=current_service.id, message_type='sms', status='sending,delivered,failed')
+  ) }}
+</div>

app/templates/views/dashboard/_usage.html

@@ -0,0 +1,23 @@
+{% from "components/big-number.html" import big_number %}
+
+<div class='grid-row'>
+  <div class='column-half'>
+    <div class="keyline-block">
+      {{ big_number("Unlimited", 'free email allowance', smaller=True) }}
+    </div>
+  </div>
+  <div class='column-half'>
+    <div class="keyline-block">
+      {% if sms_chargeable %}
+        {{ big_number(
+          (sms_chargeable * sms_rate),
+          'spent on text messages',
+          currency="£",
+          smaller=True
+        ) }}
+      {% else %}
+        {{ big_number(sms_allowance_remaining, 'free text messages left', smaller=True) }}
+      {% endif %}
+    </div>
+  </div>
+</div>

app/templates/views/dashboard/dashboard.html

@@ -1,5 +1,10 @@
 {% extends "withnav_template.html" %}
 
+{% from "components/big-number.html" import big_number, big_number_with_status %}
+{% from "components/show-more.html" import show_more %}
+{% from "components/message-count-label.html" import message_count_label %}
+{% from "components/table.html" import list_table, field, right_aligned_field_heading, hidden_field_heading %}
+
 {% block page_title %}
   {{ current_service.name }} – GOV.UK Notify
 {% endblock %}
@@ -23,7 +28,51 @@
     <h2 class="heading-medium">
       In the last 7 days
     </h2>
-    {% include 'views/dashboard/today.html' %}
+
+    <div
+      data-module="update-content"
+      data-resource="{{url_for(".service_dashboard_updates", service_id=current_service.id)}}"
+      data-key="today"
+      data-interval-seconds="2"
+      aria-live="polite"
+    >
+      <div class="grid-row">
+        {% include 'views/dashboard/_totals.html' %}
+        <div class="column-whole">
+          {{ show_more(
+            url_for('.weekly', service_id=current_service.id),
+            'Compare to previous weeks'
+          ) }}
+        </div>
+      </div>
+
+      {% if template_statistics|length %}
+        {% include 'views/dashboard/template-statistics.html' %}
+        {{ show_more(
+          url_for('.template_history', service_id=current_service.id),
+          'See all templates used this year'
+        ) }}
+      {% endif %}
+
+      {% if jobs %}
+        {% include 'views/dashboard/_jobs.html' %}
+        {{ show_more(
+          url_for('.view_jobs', service_id=current_service.id),
+          'See all uploaded files'
+        ) }}
+      {% endif %}
+
+      {% if current_user.has_permissions(['manage_settings'], admin_override=True) %}
+        <h2 class='heading-medium'>This year</h2>
+        {% include 'views/dashboard/_jobs.html' %}
+        {{ show_more(
+          url_for(".usage", service_id=current_service['id']),
+          'See usage breakdown'
+        ) }}
+      {% endif %}
+
+    </div>
+
 
   </div>
 

app/templates/views/dashboard/today.html

@@ -1,90 +0,0 @@
-{% from "components/big-number.html" import big_number, big_number_with_status %}
-{% from "components/show-more.html" import show_more %}
-{% from "components/message-count-label.html" import message_count_label %}
-{% from "components/table.html" import list_table, field, right_aligned_field_heading, hidden_field_heading %}
-
-<div
-  data-module="update-content"
-  data-resource="{{url_for(".service_dashboard_updates", service_id=current_service.id)}}"
-  data-key="today"
-  data-interval-seconds="2"
-  aria-live="polite"
->
-  <div class="grid-row">
-    <div class="column-half">
-      {{ big_number_with_status(
-        statistics.emails_requested,
-        message_count_label(statistics.emails_requested, 'email', suffix=''),
-        statistics.emails_failed,
-        statistics.get('emails_failure_rate', 0.0),
-        statistics.get('emails_failure_rate', 0)|float > 3,
-        failure_link=url_for(".view_notifications", service_id=current_service.id, message_type='email', status='failed'),
-        link=url_for(".view_notifications", service_id=current_service.id, message_type='email', status='sending,delivered,failed')
-      ) }}
-    </div>
-    <div class="column-half">
-      {{ big_number_with_status(
-        statistics.sms_requested,
-        message_count_label(statistics.sms_requested, 'sms', suffix=''),
-        statistics.sms_failed,
-        statistics.get('sms_failure_rate', 0.0),
-        statistics.get('sms_failure_rate', 0)|float > 3,
-        failure_link=url_for(".view_notifications", service_id=current_service.id, message_type='sms', status='failed'),
-        link=url_for(".view_notifications", service_id=current_service.id, message_type='sms', status='sending,delivered,failed')
-      ) }}
-    </div>
-    <div class="column-whole">
-      {{ show_more(
-        url_for('.weekly', service_id=current_service.id),
-        'Compare to previous weeks'
-      ) }}
-    </div>
-  </div>
-
-  {% if template_statistics|length %}
-    {% include 'views/dashboard/template-statistics.html' %}
-    {{ show_more(
-      url_for('.template_history', service_id=current_service.id),
-      'See all templates used this year'
-    ) }}
-  {% endif %}
-
-  {% if jobs %}
-    {% include 'views/dashboard/_jobs.html' %}
-    {{ show_more(
-      url_for('.view_jobs', service_id=current_service.id),
-      'See all uploaded files'
-    ) }}
-  {% endif %}
-
-  {% if current_user.has_permissions(['manage_settings'], admin_override=True) %}
-    <h2 class='heading-medium'>This year</h2>
-
-    <div class='grid-row'>
-      <div class='column-half'>
-        <div class="keyline-block">
-          {{ big_number("Unlimited", 'free email allowance', smaller=True) }}
-        </div>
-      </div>
-      <div class='column-half'>
-        <div class="keyline-block">
-          {% if sms_chargeable %}
-            {{ big_number(
-              (sms_chargeable * sms_rate),
-              'spent on text messages',
-              currency="£",
-              smaller=True
-            ) }}
-          {% else %}
-            {{ big_number(sms_allowance_remaining, 'free text messages left', smaller=True) }}
-          {% endif %}
-        </div>
-      </div>
-    </div>
-    {{ show_more(
-      url_for(".usage", service_id=current_service['id']),
-      'See usage breakdown'
-    ) }}
-  {% endif %}
-
-</div>