* ajusted option of chosen.
 * removed empty option in selection with chosen.
 * added debug view.
 * ajusted ui of debug panel.
 * added type to method 'checkbox' in 'front.class.php'.
 * ajusted ui of debug in 'footer.lite.html.php'.
 * removed useless code.
 * ajusted views of module 'admin', 'bug', 'doc', 'task' & 'testcase'.