[#69] added secret link for calendars (#284)

Co-authored-by: Camille Moussu <cmoussu@linagora.com>
Co-authored-by: Benoit TELLIER <btellier@linagora.com>

src/locales/en.json

@@ -5,6 +5,8 @@
     "delegated": "Delegated Calendars",
     "other": "Other Calendars",
     "caldav_access": "CalDAV access",
+    "secretUrl": "Secret URL",
+    "secretUrlDesc": "The secret address can be used to view all calendar events even without access permissions. You can reset your current secret address and get a new one.",
     "import_file_description": "Import events from an ICS file to one of your calendars.",
     "ics_feed_url": "ICS feed URL",
     "import_to": "Import to",
@@ -28,7 +30,8 @@
     "save": "Save",
     "create": "Create",
     "import": "Import",
-    "add": "Add"
+    "add": "Add",
+    "reset": "Reset"
   },
   "common": {
     "cancel": "Cancel",