Unable to Expand the Class Dialog Menu on Mac when Creating New Blueprint Class

Unable to reproduce internally.

The user is unable to expand the class dialog menu when creating a new blueprint class on his Mac. He provides a video showing the issue he is experiencing in 4.7.5 as well as how it works correctly in 4.6.1.

1. Create a new Empty BP Project
2. In the Content Browser use 'Add New' button and create a new Blueprint Class.
3. Attempt to expand the 'All Classes' menu.

[UE-23848] Bug Status

Fix UE-51650

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