Give - Recurring Donations 2.6.0

* Fix: Adjusted the column types for recurring amounts to resolve decimal amount formatting when using non-US separators.
* Fix: Removed code preventing Mollie annual (yearly) donations because the gateway now supports it.

* New: There is now a new admin email that can be enabled to notify when renewals are successfully processed.
* New: We also added a new admin email to notify when subscriptions have been cancelled.
* Tweak: Improved the donation listing page to be more performant when Recurring Donations is active.
* Fix: Ensure donation renewal frequencies are translatable.
* Fix: We improved the search within the subscriptions listing page within wp-admin to return more accurate results.

* New: Added support for sorting the subscriptions list columns withing WP-Admin.
* Fix: PayPal Pro (Payflow) issue with syncing donations resolved due to incorrect conditional check.
* Fix: Corrected issue with creating subscription tables on WP Multisite installs when activating network wide.
* Fix: Display proper singular and plural donation counts when only one donation is present in WP-Admin donor details.
* Fix: Stripe was incorrectly cancelling subscriptions when the period ends rather than waiting until the lifetime of the subscription was due.