"Import glTF" option is active in the Project window contextual menu despite no sub-actions available

How to reproduce:
1. Create a new Unity project
2. Go to AI -> Agree and install Unity AI 
3. In the Project window, right-click any Asset
4. Observe the "Import glTF" option

Expected results: "Import glTF" option is inactive because no sub-options are available
Actual results: "Import glTF" option is active

Reproducible with: 2.7.0-pre.2
Not reproducible with: No other environment tested

Reproducible on: macOS Tahoe 26 (M1)
Not reproducible on: No other environment tested