Improve user interface

app/Templates/comment_create.php

@@ -0,0 +1,17 @@
+<div class="page-header">
+    <h2><?= t('Add a comment') ?></h2>
+</div>
+
+<form method="post" action="?controller=comment&amp;action=save&amp;task_id=<?= $task['id'] ?>" autocomplete="off">
+
+    <?= Helper\form_hidden('task_id', $values) ?>
+    <?= Helper\form_hidden('user_id', $values) ?>
+    <?= Helper\form_textarea('comment', $values, $errors, array('required', 'placeholder="'.t('Leave a comment').'"'), 'comment-textarea') ?><br/>
+    <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') ?>
+        <a href="?controller=task&amp;action=show&amp;task_id=<?= $task['id'] ?>"><?= t('cancel') ?></a>
+    </div>
+</form>