Color Picker pop-up window does not update when undoing color change in UI Builder

Steps to reproduce:

1. Create a new URP project
2. Go Assets > Create > UI Toolkit > UI Document and open it in UI Builder
3. Add a Visual Element to the Hierarchy and select it
4. In the Inspector, find any Color Picker (e.g. Inlined Styles > Text > Color)
5. Open the Color Picker and select any color
6. Click Ctrl+Z shortcut to undo color change
7. Observe the Color Picker and the Color property

Actual results: The Color property is correctly undone, but the Color Picker window still shows the previously selected color

Expected results: Both the Color Picker window and the Color property should return to the previous color after undo

Reproducible with versions: 2023.1.0a4, 6000.0.74f1, 6000.3.15f1, 6000.4.6f1, 6000.5.0b7, 6000.6.0a4

Tested on (OS): Windows 11, macOS 26.4

Notes:

• Reproduces with all Color Pickers in UI Builder, but not in Color Pickers in the Editor