Split task controller into smaller classes

app/Template/task_modification/edit_description.php

@@ -0,0 +1,38 @@
+<div class="page-header">
+    <h2><?= t('Edit the description') ?></h2>
+</div>
+
+<form method="post" action="<?= $this->url->href('taskmodification', 'description', array('task_id' => $task['id'], 'project_id' => $task['project_id'], 'ajax' => $ajax)) ?>" autocomplete="off">
+
+    <?= $this->form->csrf() ?>
+    <?= $this->form->hidden('id', $values) ?>
+
+    <div class="form-tabs">
+        <ul class="form-tabs-nav">
+            <li class="form-tab form-tab-selected">
+                <i class="fa fa-pencil-square-o fa-fw"></i><a id="markdown-write" href="#"><?= t('Write') ?></a>
+            </li>
+            <li class="form-tab">
+                <a id="markdown-preview" href="#"><i class="fa fa-eye fa-fw"></i><?= t('Preview') ?></a>
+            </li>
+        </ul>
+        <div class="write-area">
+            <?= $this->form->textarea('description', $values, $errors, array('autofocus', 'placeholder="'.t('Leave a description').'"'), 'task-show-description-textarea') ?>
+        </div>
+        <div class="preview-area">
+            <div class="markdown"></div>
+        </div>
+    </div>
+
+    <div class="form-help"><a href="http://kanboard.net/documentation/syntax-guide" target="_blank" rel="noreferrer"><?= t('Write your text in Markdown') ?></a></div>
+
+    <div class="form-actions">
+        <input type="submit" value="<?= t('Save') ?>" class="btn btn-blue"/>
+        <?= t('or') ?>
+        <?php if ($ajax): ?>
+            <?= $this->url->link(t('cancel'), 'board', 'show', array('project_id' => $task['project_id'])) ?>
+        <?php else: ?>
+            <?= $this->url->link(t('cancel'), 'task', 'show', array('task_id' => $task['id'], 'project_id' => $task['project_id'])) ?>
+        <?php endif ?>
+    </div>
+</form>