Gravity Perks - Nested Forms 1.1.69

Fixed potential PHP error if an array is passed to GPNF_Parent_Merge_Tag:arse_parent_merge_tag().
Added gpnf_should_open_modal JavaScript filter hook.

Fixed potential PHP error if creating GP Nested Forms sessions programmatically.

Added German translations. Credit: Florian Rinnhofer of sportunion.at
Fixed issue where the Knockout instance would not be properly re-used on AJAX forms.