Rename subtask controller

app/Template/subtask_restriction/show.php

@@ -0,0 +1,17 @@
+<div class="page-header">
+    <h2><?= t('You already have one subtask in progress') ?></h2>
+</div>
+<form class="popover-form" action="<?= $this->url->href('SubtaskRestrictionController', 'save', array('task_id' => $task['id'], 'project_id' => $task['project_id'], 'subtask_id' => $subtask['id'])) ?>" method="post">
+
+    <?= $this->form->csrf() ?>
+
+    <p><?= t('Select the new status of the subtask: "%s"', $subtask_inprogress['title']) ?></p>
+    <?= $this->form->radios('status', $status_list) ?>
+    <?= $this->form->hidden('id', $subtask_inprogress) ?>
+
+    <div class="form-actions">
+        <button type="submit" class="btn btn-red"><?= t('Save') ?></button>
+        <?= t('or') ?>
+        <?= $this->url->link(t('cancel'), 'task', 'show', array('task_id' => $task['id'], 'project_id' => $task['project_id']), false, 'close-popover') ?>
+    </div>
+</form>