System Information
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: GeForce RTX 2070 SUPER/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 441.28

Blender Version
Broken: version: 2.82 (sub 7), branch: master, commit date: 2020-03-12 05:06, hash: rB375c7dc4caf4
Worked: 2.79

Short description of error
in the UV editor the option "export UV layout" doesn't warn you with the classic red warning if the same name is used.

Exact steps for others to reproduce the error
open the file and try to export the UV layout with the same name to see that no red warning appear.

Thank you
Max