Click animation plays but nothing happens when clicking the Burger button in the Gradient Editor while a new Preset is being created

Steps to reproduce:

1. Create a new Unity project using the Universal 3D template
2. Create a new Particle System in the Hierarchy (Visual Effects > Particle System)
3. Select the newly created Particle System in the Hierarchy
4. Change "Start Color" to Gradient in the Inspector
5. Open the Gradient Editor by clicking the color strip
6. Click the Burger button by the Presets section and select "List"
7. Click the "New" button to create a new Preset but do not finish editing the name fo the Preset
8. Click the Burger button in the Gradient Editor
9. Observe the Gradient Editor

Actual results: Nothing happens

Expected results: Burger button's context menu is opened

Reproducible with versions: 6000.0.0f1, 6000.0.80f1, 6000.3.21f1, 6000.5.6f1, 6000.6.0b6, 6000.7.0a4

Tested on (OS): MacOS Silicon Tahoe 26.5.1

Notes:

• Other interactable elements in the Gradient Editor work as intended