Force-unlock button

[benloh]

A force-unlock button on a locked node or edge usable only by an administrator. That would be really helpful. We still occasionally run into a locked node or edge (when someone clicks off it without hitting close or cancel) but no good repeatable process to force the behavior. An admin button would help get around that without a restart.

[benloh]

@kalanicraig just in case you weren't aware of it, you can always use ncUnlockAll() in the web console to force all nodes, edges, and templates to be unlocked.