Put uploaded files on the dashboard

This commit depends on and uses the data returned by:
- [x] https://github.com/alphagov/notifications-api/pull/345
- [x] https://github.com/alphagov/notifications-api/pull/347
- [x] https://github.com/alphagov/notifications-admin/pull/612

It puts the last 5 jobs on the dashboard. This should be changed to all the jobs
from the last 7 days when that parameter is available.

It also:
- links to the jobs page
- makes the numbers on the jobs page consistent with the dashboard
- makes the numbers on an individual job consistent with the appearance of the
  dashboard

app/assets/stylesheets/views/dashboard.scss

@@ -1,6 +1,16 @@
 .dashboard {
-  table th {
-    font-size: 0;
+
+  table {
+    th {
+      @include core-16;
+      padding-top: 0;
+      border: 0;
+    }
+
+    td {
+      @include core-19;
+      border: 0;
+    }
   }
 }
 
@@ -15,12 +25,9 @@
   box-sizing: border-box;
   display: block;
   width: 100%;
-  text-align: right;
   margin-bottom: $gutter-half;
   height: $gutter-half;
   color: $govuk-blue;
-  text-align: left;
-  color: $govuk-blue;
 
   span {
     box-sizing: border-box;
@@ -47,3 +54,17 @@
   }
 
 }
+
+.file-list {
+
+  &-filename {
+    @include bold-19;
+  }
+
+  &-hint {
+    @include core-16;
+    display: block;
+    color: $secondary-text-colour;
+  }
+
+}