Section headers "Grid Brush Flood Fill Extents" and "Grid Brush Scene View Text" don't follow the documented header-sizing convention (Preferences > 2D > Grid Brush)

Steps to reproduce:

1. Create or open a project
2. Open Preferences > 2D > Grid Brush
3. Compare the font size of the page title "Grid Brush" against its section headers "Grid Brush Flood Fill Extents" and "Grid Brush Scene View Text"
4. For reference, compare against Preferences > 2D > Physics ("Physics" title vs "Colliders"/"Contacts" headers) or Project Settings > Analysis > Project Auditor ("Project Auditor" title vs "Analysis"/"Build"/"Report" headers)

Actual results: In Grid Brush, the section headers render at the same font size as the page title - measured at 29px text height for both "Grid Brush" (title) and "Grid Brush Flood Fill Extents" (section header). There is no visual distinction in size between the page title and its section headers.

Expected results: Section headers in the Grid Brush page should be consistent with other pages in the Preferences section

Reproducible with versions: 6000.6.0b8, 6000.7.0a4

Can’t test with versions: 6000.0.80f1, 6000.3.22f1, 6000.5.7f1 - Grid Brush window is not updated with new header titles

Tested on (OS): MacBook Pro - Tahoe 26.5.2