Add link to delete a template

This is a link not a button because:
- it’s less prominent—delete is an infrequent action
- it’s a two-step process, and only the second part changes any data (so it has
  a button)

app/assets/stylesheets/components/banner.scss

@@ -27,3 +27,20 @@
   }
 
 }
+
+.banner-dangerous {
+
+  @extend .banner;
+  background: $white;
+  color: $error-colour;
+  border: 5px solid $error-colour;
+  margin: 15px 0;
+  @include bold-19;
+  text-align: left;
+
+  .button {
+    @include button($error-colour);
+    margin-top: 10px;
+  }
+
+}

app/assets/stylesheets/components/page-footer.scss

@@ -7,6 +7,26 @@
     margin-top: $gutter;
   }
 
+  &-delete-link {
+
+    line-height: 40px;
+    padding: 0 0 0 5px;
+
+    a:visited,
+    a:link {
+      color: $error-colour;
+      display: inline-block;
+      vertical-align: center;
+    }
+
+    a:hover,
+    a:active {
+      color: $mellow-red;
+    }
+
+  }
+
+
   .button {}
 
   .button-destructive {