Outdated themes caused major problems (cannot edit settings, change categories,...) with a fresh(!) installation of NodeBB for me. I had to wait for days to finally get the solution. This is really bad and might scare away admins who think about using NodeBB and don't even know that their themes are outdated (because they just installed the latest version as described in the docs)
I would suggest to add a row "Components up2date" to the box which checks the version in the ACP. If something is not up2date, it should be displayed in a indented row below the "Components up2date" row. Colors might be green (ok), orange(unchecked) and red(outdated).

See example GUI: