M8: Opening a file contacts no team library server it names until you check it (#1621)

* M8: opening a file contacts no team library server it names until you check it (#1097)

* M8: translate the team library check strings (#1097)

* M8: the Assets panel library test checks what allows a library, without its own fake link (Sonar duplication and coverage)

crates/engine/src/extensions/plugins.rs

@@ -107,6 +107,8 @@ const DENIED: &[&str] = &[
     "plugins.",
     "libraries.",
     "library.add",
+    // Contacts the servers a file names, and remembers them as yours (#1097).
+    "library.check",
     // Uploads the open document to a server.
     "library.publishToServer",
     "edit.undo",