add a formfactor session variable which is autodetected but can also manually overwritten via a get variable. currently we have:          * default -> the normal desktop browser interface          * mobile -> interface for smartphones          * tablet -> interface for tablets          * standalone -> the default interface but without header, footer and sidebar. just the application. useful to use just a specific app on the desktop in a standalone window. In the future we should adapt the userinterface to the specific formfactor.
add a formfactor session variable which is autodetected but can also manually overwritten via a get variable.
currently we have:
         * default -> the normal desktop browser interface
         * mobile -> interface for smartphones
         * tablet -> interface for tablets
         * standalone -> the default interface but without header, footer and sidebar. just the application. useful to use just a specific app on the desktop in a standalone window.
In the future we should adapt the userinterface to the specific formfactor.

lrytz/core,IljaN/core,bluelml/core,owncloud/core,owncloud/core,xx621998xx/server,IljaN/core,pollopolea/core,andreas-p/nextcloud-server,nextcloud/server,sharidas/core,jbicha/server,Ardinis/server,andreas-p/nextcloud-server,pmattern/server,pmattern/server,pmattern/server,IljaN/core,sharidas/core,endsguy/server,endsguy/server,owncloud/core,pollopolea/core,pmattern/server,nextcloud/server,pollopolea/core,pixelipo/server,whitekiba/server,pollopolea/core,cernbox/core,cernbox/core,xx621998xx/server,lrytz/core,whitekiba/server,pmattern/server,whitekiba/server,endsguy/server,phil-davis/core,pixelipo/server,Ardinis/server,owncloud/core,nextcloud/server,pixelipo/server,andreas-p/nextcloud-server,sharidas/core,cernbox/core,michaelletzgus/nextcloud-server,pixelipo/server,cernbox/core,lrytz/core,xx621998xx/server,andreas-p/nextcloud-server,pixelipo/server,jbicha/server,jbicha/server,xx621998xx/server,whitekiba/server,IljaN/core,michaelletzgus/nextcloud-server,sharidas/core,bluelml/core,michaelletzgus/nextcloud-server,whitekiba/server,lrytz/core,jbicha/server,Ardinis/server,endsguy/server,lrytz/core,michaelletzgus/nextcloud-server,andreas-p/nextcloud-server,pollopolea/core,cernbox/core,IljaN/core,xx621998xx/server,nextcloud/server,bluelml/core,Ardinis/server,bluelml/core,bluelml/core,sharidas/core,endsguy/server,jbicha/server,Ardinis/server,owncloud/core