How to reproduce:
1. Create a new Unity project
2. Go to Window -> Analysis -> Build Analysis
3. Observe the tab header
Expected results: Tab header has an icon
Actual results: Tab header is missing an icon
Reproducible with: 6000.6.0a6
Can't test with: 6000.0.76f1, 6000.3.15f1, 6000.4.8f1, 6000.5.0b9 (No Build Analysis)
Reproducible on: macOS Tahoe 26 (M1)
Not reproducible on: No other environment tested