DisplayThumbnail doesn't work with TArray

The DisplayThumbnail metadata UProperty specifier does not work on TArrays with the type of FSoftObjectPath.

Tested in 4.21.2 (CL - 4753647), 4.22.3 (CL - 7053647), 4.23 (CL - 7224811), 4.24 (CL - 7225709)

1. Download the attached project
2. Create a Blueprint instance of the MyActor class in the C++ classes folder
3. Open the Blueprint 

Expected: The thumbnail for the array is hidden

Result: The thumbnail is still being shown