add a label calendar to the settings page - bugfix for oc-157
add a label calendar to the settings page - bugfix for oc-157

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