Shadow Panel: Add reset button

[t-hamano]

Related PRs:

• Add reset button to color control #67116
• Add reset button to ColorGradientSettingsDropdown #67800
• Shadows: Always show reset button if hover is not supported #68122
• Color Gradients: Adjust max-width for color gradient swatch to accommodate reset button size #68626

What problem does this address?

In the color panel, if any value is set, a reset button will be displayed on the item itself:

On the other hand, the Shadow panel has no reset button even though values ​​are set:

What is your proposed solution?

It would be useful to have a reset button on the Shadow panel as well.

[yogeshbhutkar]

I'd be happy to work on this enhancement. There's also another similar PR for the Duotone control here.

[Mamaduka]

Can we extract this into a reusable component but keep it internal for Global Styles?

[yogeshbhutkar]

Can we extract this into a reusable component but keep it internal for Global Styles?

I believe we can. It will reduce the redundancy.

We can introduce a reusable component in this PR and create a separate PR refactoring the previous usage to use this component.

Hi @t-hamano (apologies for tagging), since you've already reviewed two of my similar PRs, I'm tagging you for a second opinion before implementing this change. Please let me know what your thoughts are.

[t-hamano]

Can we extract this into a reusable component but keep it internal for Global Styles?

Does this mean extracting the reset button part into a reusable component? If so, I think that's possible.

[Mamaduka]

I was thinking about the whole component. They seem to have a similar layout - icon + label + reset.

We can always abstract later - duplication is better than a bad abstraction. Let's try to land current PRs first.