How can I redo all posters in the library?

[OttoKerner]

Reset all manual poster selections in a library at once or unlock other metadata fields

The following could be most useful for very old libraries, which had their metadata agent already changed several times. For instance if the server admin has manually selected different posters on many items, but now wants to make a clean break and leave all poster selections to the agent. While one could do that by deleting the library and re-creating it, it might however be a bit drastic a measure. What it does: reset the locked attribute of all poster selections in a given library. Upon t…

Or remove the whole library and re-create it fresh.