Gravity Perks - Advanced Save and Continue 1.0.26

Fixed a potential JavaScript error when using the [gpasc_drafts] shortcode.
Fixed PHP 8 warnings.

Updated to allow disabling "Start new draft" link if falsey value is returned by the gpasc_new_draft_link_text filter.
Added gpasc_form_resume_tokens filter to allow filtering the resume tokens before they are returned.

Added the $display_name and $resume_token_data to the gpasc_resume_notice_message to make these variables easier to access.