Add a page to display completed tasks and add the completion date column for tasks

templates/board_index.php

@@ -1,7 +1,9 @@
 <section id="main">
 
-    <div class="page-header">
-        <h2><?= t('Project "%s"', $current_project_name) ?></h2>
+    <div class="page-header board">
+        <h2>
+            <?= t('Project "%s"', $current_project_name) ?>
+        </h2>
         <ul>
             <?php foreach ($projects as $project_id => $project_name): ?>
             <?php if ($project_id != $current_project_id): ?>
@@ -13,6 +15,12 @@
         </ul>
     </div>
 
+    <div class="project-menu">
+        <ul>
+            <li><a href="?controller=project&amp;action=tasks&amp;project_id=<?= $current_project_id ?>"><?= t('completed tasks') ?></a></li>
+        </ul>
+    </div>
+
     <table id="board" data-project-id="<?= $current_project_id ?>">
         <tr>
             <?php $column_with = round(100 / count($columns), 2); ?>