[stable-4.2] fix: hide calendar when env var FRONTEND_DISABLE_RADICALE is set to true (#1660)#1671

AlexAndBear merged 1 commit intostable-4.2opencloud-eu/web:stable-4.2from

backport/stable-4.2/pr-1660opencloud-eu/web:backport/stable-4.2/pr-1660Copy head branch name to clipboard