The cogwheel icon in the Animation window is different size on the Light and Dark Editor themes when the Editor theme is changed

Steps to reproduce:

1. Create a new project using the Universal 3D template
2. Create a new Cube GameObject (GameObject > 3D Object > Cube)
3. Select the newly created Cube GameObject in the Hierarchy window
4. Open the Animation window (Window > Animation > Animation)
5. Dock the Animation window
6. Create a new Animation
7. Change the Editor theme to Light (Unity > Settings > General > Editor Theme)
8. Observe the cogwheel icon in the Animation window
9. Change the Editor theme to Dark (Unity > Settings > General > Editor Theme)
10. Repeat step 8

Actual results: The cogwheel icon size is different depending on the set Editor theme

Expected results: The cogwheel icon size is the same on any Editor theme

Reproducible with versions: 6000.5.0a7

Can’t test with versions: 6000.0.68f1, 6000.3.10f1, 6000.4.0b9 (due to no cogwheel icon)

Tested on (OS): MacOS Silicon Tahoe 26.2, Ubuntu 24.04