Setting the base class dropdown of an Object Library to Actor prevents you from being able to add any actors to the library. This occurs even when the Has Blueprint Classes bool is checked.
Found in 4.10.2 binary. Reproduce in 4.11 Preview 3, Main CL 2841903.
1. Open the editor
2. Create a new Object Library (right click in the content browser, go to Miscellaneous->Object Library.)
3. Set the base class dropdown to Actor
4. Check the Has Blueprint Classes bool
5. Add an Object
6. Attempt to set the dropdown to a blueprint based on actor
Result: The dropdown remains "None" instead of being set to the actor blueprint you've selected.
Expected: The blueprint would be successfully added to the object library
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