Paid Memberships Pro 3.3.3

* BUG FIX/ENHANCEMENT: Fixed typos in some block descriptions. #2064 (@mircobabini)
* BUG FIX: Fixed issue where the digest email cron and some others were running more often than intended. #2070 (@mircobabini)

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* FEATURE: Added refunds buttons for Stripe and Paypal Express orders.
* FEATURE: Released Beta version of Stripe Checkout. Add `define('PMPRO_STRIPE_CHECKOUT_BETA_ENABLED', true);` to your wp-config.php to enable this gateway during the beta.
* ENHANCEMENT: Introduced a new set of functions that handle cron-related tasks including: `pmpro_get_crons()` to get the list of PMPro registered crons.
* ENHANCEMENT: New filter `pmpro_registered_crons` which you can register new crons to be handled by PMPro. They show up in the PMPro Site Health info and are automatically scheduled when they need to be.
* ENHANCEMENT: Added an opt-in stats collection so we can get better insight on how people use Paid Memberships Pro.
* ENHANCEMENT: Added Formal German translation files.
* ENHANCEMENT: Tracking library conflicts in Site Health, e.g. when other plugins are loading gateway libraries at the same time as PMPro.
* ENHANCEMENT: UI/UX improvements to the Orders admin area for list and single edit view.
* ENHANCEMENT: Improved the UI for email template variables reference on the Settings > Email Templates admin page.
* ENHANCEMENT: Various other UI improvements to the admin area.
* ENHANCEMENT: Improved block names, descriptions, keywords, and organization for discover and usability.
* ENHANCEMENT: Added "show_noaccess" as a setting on the Membership Required block for swapping in the appropriate content message.
* ENHANCEMENT: Added filter 'pmpro_braintree_transaction_sale_array' to allow adding or adjusting of the sale transaction method.
* ENHANCEMENT: Moved the TOS input inside the label to support multiline i18n.
* ENHANCEMENT: Added new action `pmpro_checkout_after_tos` to output content after the TOS.
* ENHANCEMENT: Added filters to change gateway ipn/webhook logfile.
* ENHANCEMENT: Added filter to perform actions during PPHttpPost() method of the PayPal gateways.
* ENHANCEMENT: Added untranslated gateway identifiers to Site Health info.
* BUG FIX/ENHANCEMENT: Fixed escaping and localization for many strings across the codebase.
* BUG FIX/ENHANCEMENT: Resolve admin area conflicts with other plugins using similar class names.
* BUG FIX: Crons are now automatically rescheduled if they disappear form the cron schedule.
* BUG FIX: Resolved problems with PHP float precision and prevent passing along faulty floats to the gateway APIs.
* BUG FIX: Fixed issue where TOS setting was not saving when using the PayFast gateway.
* BUG FIX: Fixed issue where the is_renewal() method didn't work during the pmpro_added_order hook.

* ENHANCEMENT: Now sending "name" separate from the "description" when creating customers for Stripe checkouts. (@ideadude)
* ENHANCEMENT: You can now search the members list on specific user table columns or user meta fields by using a colon in your search term. These queries are faster than the default queries. The format is meta_key:meta_value (no backticks). You can also use login, nicename, email, url, or display_name as the meta_key and the users table will be searched against the related column. (@ideadude)
* BUG FIX/ENHANCEMENT: Increased search limit to make sure we reuse Stripe "prices" when members check out for recurring plans with Stripe. (@ideadude)
* BUG FIX: Fixed issue where Stripe application fees were still charged for PMPro Standard and PMPro Builder license holders. From now on, payments and subscriptions will not include the fee.