ProBuilder icons in Scene view and Inspector are low quality and difficult to see when Editor theme is set to Light

Steps to reproduce:
1. Create new Unity project using empty URP 3D Template
2. Change Editor theme to Light
3. Open Package Manager window
4. Find and install ProBuilder package
5. Once installed, observe the ProBuilder icons in the Scene view
6. Draw a shape and observe ProBuilder icons in Inspector window 

Actual results: Scene view and Inspector window icons for ProBuilder not adapted for Light Editor theme, they are blurry and difficult to see

Expected results: Scene view and Inspector window icons for ProBuilder are visible in Light Editor theme and high quality

Reproducible with versions: 6.0.7 (6000.0.60f1, 6000.2.8f1, 6000.3.0b6 6000.4.0a2)

Tested on (OS): macOS Silicon, Tahoe 26.0 (M1)