Astra Pro - Extend Astra Theme With the Pro Addon 4.6.8

- Improvement: Frontend optimization by loading WooCommerce 'Shop Page' pagination JS file conditionally.
- Improvement: Frontend optimization by loading 'Blog Page' infinite pagination JS conditionally.
- Fix: Fatal error on changing the value of some controls in Customizer - compatibility with PHP 8.0.

- Fix: 'Display on Mobile Devices' option dependency added with all the options in Section 1 & 2 of Above and Below headers.
- Fix: Submenu icons having wrong position in RTL view on responsive devices.
- Fix: MegaMenu background image option not working.
- Fix: PHP fatal error while previewing themes other than Astra in customizer when Astra Pro is activated.

- New: Gradient color option for background control in customizer. ( New Color Controls in Astra theme & Astra Pro Addon )
- Improvement: Color, Responsive Color, Background & Responsive Background control now uses Gutenberg's control in customizer. ( New Color Controls in Astra theme & Astra Pro Addon )
- Improvement: All custom controls HTML markup was loading from PHP, which is now moved to React JS for better and optimized customizer performance. ( Astra 2.6 - Bringing Faster Customizer and Better Color Controls )
- Fix: Infinite scroll was loading all types of posts on the blog page.
- Fix: PHP fatal error while previewing other themes in customizer when Astra Pro is activated.