Gravity Forms 2.8.11

- Added support for WordPress 5.5.
- Updated background updates to be compatible with automatic updates in WordPress 5.5.
- Updated the translated countries list to be sorted alphabetically.
- Fixed a fatal error which occurs when the PowerPack for Beaver Builder plugin uses `GFCommon::gform_do_shortcode()`.
- Fixed an issue with the empty form validation ignoring the values of fields with visibility set to hidden.
- AF: Fixed a JavaScript error with WordPress 5.5 which prevents dynamic and generic mapping type settings rendering correctly.
- AF: Fixed an issue with WordPress 5.5 that breaks the layout of the results pages.
- API: Added GF_Field_Address::get_default_countries() which returns the default array of countries using the ISO 3166-1 alpha-2 code as the key to the country name.
- API: Fixed the value not being padded when true is passed for the fifth argument of the Currency.numberFormat method in gravityforms.js.
- API: Fixed an issue where GF_Field_Address::get_country_code() would return null for some translated countries.

- AF: Fixed a JavaScript error with WordPress 5.5 which prevents dynamic and generic mapping type settings rendering correctly.

- Added cosmetic tweaks to the form editor.
- Updated design of progress bar, added new design options.
- Differentiated secondary buttons from primary buttons and improved styling for secondary buttons.
- Updated toggle animations on settings pages.
- Updated database column widths to be compatible with MySQL 8.0.17+.