New flow for managing periods

The payment of the period and approval of periods have been improved. There is now the possibility to approve people within a period and write a comment on the employee. There are also new fields within the period that show the reason why the person ends up with a certain balance. When a payment has been made, the status should change to “Approved for payment” and then the status will not change automatically and the addition and deduction feature will not be visible in the view.