Related: brassberg/tickets#244

Related: #100

feat: Separate lang and currency switch. New template settings to manage this controls #86 #76

feat: New setting --> detatch nav from top and place it initialy by scrolling at the top.

feat: Menu logo has width and height properites.

feat: Show shipping time in product list.

#15

feat: new settings --> equipment and similar products can be displayed as tab, after product description or hidden.

feat: $Site and $Project are global assigned. No needed to pass it on as params.

feat: show stock field if quiqqer/stock-management is installed

refactor: Background on product details.

feat: Payments control added.

feat: New template settings (show / hide shop categories menu).

#1

feat: All layouts are ready.
feat: Translations for settings, layouts and brick areas.

feat: Template layouts (no-sidebar, start-page).
feat: Template settings caching.