Add an icon for read items inside the view feed-items

assets/css/app.css

@@ -449,6 +449,10 @@ nav .active a {
     color: #555;
 }
 
+.items a.read {
+    color: #666;
+}
+
 /* item */
 .item {
     padding-left: 5px;

templates/feed_items.php

@@ -27,7 +27,11 @@
                     href="?action=show&amp;menu=feed-items&amp;id=<?= $item['id'] ?>"
                     data-item-id="<?= $item['id'] ?>"
                     id="open-<?= $item['id'] ?>"
+                    <?= $item['status'] === 'read' ? 'class="read"' : '' ?>
                 >
+                    <?php if ($item['status'] === 'read'): ?>
+                        ☑
+                    <?php endif ?>
                     <?= Helper\escape($item['title']) ?>
                 </a>
             </h2>