Added function to replace tabs with a drop-down list (Accordion)

Added function to replace tabs with a drop-down list (Accordion)

Added function to replace tabs with a drop-down list (Accordion)

Added the function of testing sites for various applications.
New menu block position — At the top, below the category tree
Updated styles of "Varieties": Added images, SKUs, prices, wholesale prices, texts, as well as new styles.