Add two automatic actions for subtasks

- Action to create a subtask assigned to the creator and start the timer
- Action to stop the timer of subtasks

app/Locale/cs_CZ/translations.php

@@ -1367,4 +1367,7 @@ return array(
     // 'Time Spent' => '',
     // 'External Link' => '',
     // 'This feature enable the iCal feed, RSS feed and the public board view.' => '',
+    // 'Stop the timer of all subtasks when moving a task to another column' => '',
+    // 'Subtask Title' => '',
+    // 'Add a subtask and activate the timer when moving a task to another column' => '',
 );