Gravity Forms Coupons Add-On 3.5.2

- Update to use the new Gravity Forms accessible datepicker.
- Fixed a bug where expired coupons can still be applied automatically through dynamic population.
- Fixed an issue where saving an existing coupon can cause a redirect, preventing the updated banner from appearing.
- Fixed use of deprecated currency class.

- Fixed an issue where the Start Date and End Date datepickers on the coupon edit page were unstyled with Gravity Forms 3.0 by adopting the new accessible datepicker.
- Fixed a bug where expired coupons could still be applied automatically through dynamic population.
- Fixed an issue where saving an existing coupon caused a redirect, preventing the updated banner from appearing.

Fixed use of deprecated currency class.

- Added [`gform_coupons_update_usage_count`](https://docs.gravityforms.com/gform_coupons_update_usage_count/) filter to allow custom code to determine when the usage count should be updated (i.e. when an entry is marked as Paid).
- Updated the Coupon field so that it can’t be placed in a repeater or duplicated in the form editor.
- Updated the title that displays on the logging page.
- Fixed an issue where the Coupon icon is not displayed on the Uninstall screen.
- Fixed an issue that causes the coupon usage count to be updated multiple times for a single submission in certain situations such as when using the Stripe Add-On.

- Fixed an issue where the Coupon icon is not displayed on the Uninstall screen.
- Updated the title that displays on the logging page.
- Fixed an issue that causes the coupon usage count to be updated multiple times for a single submission in certain situations such as when using the Stripe Add-On.
- Added [`gform_coupons_update_usage_count`](https://docs.gravityforms.com/gform_coupons_update_usage_count/) filter to allow custom code to determine when the usage count should be updated (i.e. when an entry is marked as Paid).

- Updated the theme framework variables to be compatible with Gravity Forms 2.8.
- Fixed an issue where the datepicker doesn't appear when creating a coupon with no conflict mode enabled.