Searching for detached files used PostSearchService, which by default
hides all hidden posts unless user explicitly asks to search for them.
That way, all hidden posts were treated as detached, so their content
was being removed when using the script in question.
When getting settings from database, running across NULL loads default
setting for given option. Becuase entity unserializer always returned
NULLs instead of FALSEs due to bug in TextHelper, it ended up always
loading default settings (but only after reloading entity, setting it in
the settings page worked correctly until relog).
This fix is closely related to fde6fc2.
