Render Pipeline Converter sections don't stretch to the width of the window

How to reproduce:
1. Create a new URP Unity project
2. Go to Window -> Rendering -> Render Pipeline Converter
3. Observe the sections

Expected results: The sections' headers match the width of the window
Actual results: The sections' headers are way smaller than the width of the window

Reproducible with: 6000.4.0a4
Not reproducible with: 6000.0.61f1, 6000.2.11f1, 6000.3.0b10, 6000.4.0a3, 6000.5.0a1

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