After you click on the green Reset button near the color picker, the color code is changed, but the color from the field remains unchanged

Steps to reproduce:

1. Click on Administer Wiki
2. Click on Presentation
3. Click on the default theme
4. Click Edit
5. (E.g.) Fill in the Menu Gradient Color
6. Do not close the edit color picker
7. Click on the small green Reset button

When press on the Reset button, the color code is changed, but the color from the field remains unchanged until you press on that field.