Keep object list up to date #3
Description
Every now and then, test if known objects are still responding.
If they do not respond, remove them from the known list.
If links to these objects exist, put these links in hibernation until the objects come back online.
Include the field active: true/false in to the link object so that the Editor can indicate if the link is active or not. The editor should then react with a certain visual cue.