Smart Manager For WooCommerce 8.37.0

* New: WordPress v5.9 compatible
* New: Compatibility with [WooCommerce Dropshipping]
* Update: Improvements related to overriding Order Print Invoice template (WooCommerce)
* Update: Pricing page related changes
* Update: POT file
* Fix: Some minor fixes

* New: WordPress v5.8.3 compatible & WooCommerce v6.1.1 compatible
* New: Compatibility with [LifterLMS](https://wordpress.org/plugins/lifterlms/) (Pro)
* New: Compatibility with [ShopEngine](https://wordpress.org/plugins/shopengine/) (Pro)
* Fix: Declaring a required parameter after an optional one is deprecated (PHP8) (Thanks to Tobias Larsen)
* Fix: Advanced Search returning incorrect results when searching using Product Category
* Update: POT file
* Fix: Some minor fixes

* New: WooCommerce v6.0.0 compatible
* New: Translation files for Russian (Thanks to Almaz Mannanov)
* Fix: Media ordering not maintaining when adding images to 'Product Gallery Images' field for WooCommerce Products
* Update: Display placeholder image for 'image' type columns in grid
* Update: POT file
* Fix: Some minor fixes