Added new template with demo and quick install.

Added template demo and quick install. The template is implemented with the ability to change the color scheme in the design editor.
View Demo
Install template.

Added new template with demo and quick install.

Updated add cart button editor.
Added the ability to charge Bonuses / Cashback to the client's balance for registration.
Added a pop-up window for managing the list of "Related products", "Synonymous products" ...