Gravity Forms Help Scout Addon 2.4.0

- Fixed code placement to be consistent with the WordPress coding standards.
- AF: Updated process_feed() return value for compatibility with Gravity Forms 2.9.4, so the framework can save the feed status to the entry meta.

- Added the [gform_helpscout_display_enable_custom_app_setting](https://docs.gravityforms.com/gform_helpscout_display_enable_custom_app_setting/) filter.
- Added support for async (background) feed processing to improve form submission performance.
- Fixed a PHP 8.2 deprecation notice that occurs when selecting "I want to use a custom Help Scout app" on the plugin settings page.
- Fixed an issue where the Merge Tags button is not available on the feed settings page for text area fields.
- Fixed an issue that causes a notice to display when creating a new feed on sites running PHP 8.1.
- Fixed an issue where the Help Scout primary account email address is used as the reply-to email address even if the form submission data has a different email address.

- Added support for async (background) feed processing to improve form submission performance.
- Fixed an issue where the Help Scout primary account email address was used as the reply-to email address even if the form submission data has a different email address.