changed l::get() to l()

Signed-off-by: alkaest2002 <p.calanna@gmail.com>
simplified tests.php code

Signed-off-by: alkaest2002 <p.calanna@gmail.com>
updated tests.php

added testing remaining time
added different css classes and button labels logic

Signed-off-by: alkaest2002 <p.calanna@gmail.com>