Improve user interface

app/Templates/file_remove.php

@@ -0,0 +1,14 @@
+<div class="page-header">
+    <h2><?= t('Remove a file') ?></h2>
+</div>
+
+<div class="confirm">
+    <p class="alert alert-info">
+        <?= t('Do you really want to remove this file: "%s"?', Helper\escape($file['name'])) ?>
+    </p>
+
+    <div class="form-actions">
+        <a href="?controller=file&amp;action=remove&amp;task_id=<?= $task['id'] ?>&amp;file_id=<?= $file['id'] ?>" class="btn btn-red"><?= t('Yes') ?></a>
+        <?= t('or') ?> <a href="?controller=task&amp;action=show&amp;task_id=<?= $task['id'] ?>"><?= t('cancel') ?></a>
+    </div>
+</div>