Code cleanup. Rearrange scripts initialization calls.
Update admin fields. Remove return page field. Change SSL keys fields type to textarea.
Code cleanup. Remove unneeded comments.
Code cleanup. Remove unneeded comments.
Code cleanup. Remove unneeded comments. Make generate_banklink_form method accept  parameter instead
Code cleanup. Remove unneeded comments. Generate payment form dynamically based on chosen payment method.
Code cleanup. Remove unneeded comments.
Code cleanup. Remove unneeded comments. Rearrange actions and remove unneeded methods.
Remove php.ini