Related: brassberg/tickets#244


(cherry picked from commit 28cc1658)

Co-authored-by: Michael Danielczok <michael@pcsg.de>

Related: #100

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.

refactor: Product Template adjusted.

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

#39

feat: Social icons for email template come with template.
feat: User panel mobile optimized.

feat: Paypal button in small basket adapted.