Rollback the color settings from gradient to solid, The gradients bar still shows and the gradient mode button still show pressed.

Steps:

1. Create a qt quick project.
2. Open the main.qml file with qml design.
3. Add a rectangle to the main rectangle.
4. Set the color to "#808080", and then change the rectangle color to Gradient, and set the gradients color.
5. Press "Command + Z" to Rollback to solid color setting.

Expect result:

The user operation canceled, the rectangle color reset to "#808080" in canvas window, and all the value and button status of Colors setting buttons are correct.

Actual Result:

The gradient button is pressed and gradients bar still shows.