Pixelated lens icon in the Search window

Steps to reproduce:

1. Create a new Unity project using the Universal 3D template
2. Open the Search window (Window > Search > New Window)
3. Toggle Saved Searches Panel
4. Observe the lens icon in the Saved Searches Panel

Actual results: The lens icon is pixelated

Expected results: The lens icon is not pixelated and is high definition as other icons

Reproducible with versions: 6000.0.57f1, 6000.3.0a2, 6000.3.0b1

Not reproducible with versions: 6000.2.3f1, 6000.3.0a1

Tested on (OS): macOS Silicon Sequoia 15.6.1