Astra Pro - Extend Astra Theme With the Pro Addon 4.6.8

- Fix: Undefined function PHP error occurs when theme functions are not loaded in a few scenarios.
- Fix: Too few argument PHP warning in comment section

- Improvement: Filter 'astra_single_featured_image_post_types' to apply Featured Image Size to pages also.
- Improvement: Filters to Disable Schema. ( Disable Schema Markup Added by Astra )
- Improvement: Filter to disable WooCommerce quantity buttons. ( Filter to Disable Plus-Minus Buttons for Product Quantity on WooCommece Cart and Single Product Page )
- Improvement: Filters 'astra_advanced_header_layout_1_title_tag', 'astra_advanced_header_layout_2_title_tag' to change HTML tag of the Advance Header title.
- Fix: Added AMP prefix to CSS files for AMP specific pages.
- Fix: Mega Menu not closing on mouse out.
- Fix: Fatal error on AMP pages when a theme from AMPforWP Plugin is activated.
- Fix: Scroll to top background color and hover color not working.
- Fix: .hidden CSS class renamed to .ast-hidden class due to conflict with third party plugins.
- Fix: Compatibility with WordPress 5.3.
- Fix: Product Sorting not working when Infinite Scroll is enabled for WooCommerce Products.
- Fix: Single Post Inside Spacing option not working for Author info box.

- Improvement: WooCommerce Product Gutenberg blocks compatibility.
- Improvement: Custom Layouts and Page Headers menu will be visible only to users with `edit_theme_options` capability.
- Fix: Sub menu closes on page scroll for android devices.
- Fix: Wrong WooCommerce product variation added to cart when more than one add to cart form is displayed on page.
- Fix: WP Bakery shortcodes not working when Auto Load Previous Posts option is enabled from the customizer for the single blog.
- Fix: WooCommerce header cart icon options live preview not working in the customizer.
- Fix: Full Width sticky header not working when Header Button selected in Last Menu Item.