v2.0.13b1

• Fix unique time error
• Improve calculations across page breaks
• Prevent clearing default values when hiding/showing sections
• Run calculations in collapsible sections
• Fix duplicating regular sections
• Allow layout classes to be used with submit button
• Remove frm_last class
• Prevent get_filesystem_method error in multisite after update
• Conditionally use ssl for the ajax url for form submission
• Fix importing parent_form_id on child forms