Fix `lightlastseeninterval` not displayed via REST API
Fix `lightlastseeninterval` not displayed via REST API

Using the parameter works, but display via GET on `config` resource doesn't display it.

dresden-elektronik/deconz-rest-plugin,dresden-elektronik/deconz-rest-plugin,dresden-elektronik/deconz-rest-plugin,dresden-elektronik/deconz-rest-plugin,dresden-elektronik/deconz-rest-plugin