FEATURE: allow user to set preferred sidebar list destination (#18594)

User can choose between latest or new/unread and that preference will affect behavior of sidebar links.

spec/requests/api/schemas/json/user_get_response.json

@@ -767,6 +767,9 @@
             },
             "oldest_search_log_date": {
               "type": ["string", "null"]
+            },
+            "sidebar_list_destination": {
+              "type": "string"
             }
           },
           "required": [