Updated the style of the Admin Panel and Admin Center for mobile devices.

Updated the style of the Admin Panel and Admin Center for mobile devices.

Updated the style of the Admin Panel and Admin Center for mobile devices.

Added a group change "Prices" - "Markup", based on the "Purchase price".
Added the ability to set a tax with automatic recalculation of the final cost.
Added search and change of "Manufacturers" to the group editor.