ComboboxControl: Increase the size of the Reset button

[afercia]

Description

A farily new design pattern in the editor places buttons in a way that they visually appear within a related input field. Examples of this pattern can be seen, for example, in the LinkControl and in the Post URL setting popover. Screenshot:

As an accessibility specialist, I'm not sure I'd support this pattern because the visual appearance of a button inside an input field is somehow unexpected and disorienting.

Regardless, this pattern should at least be consistent.

Turns out the ComboboxControl does have an optional Reset button. Its size is way smaller and it's pretty inconsistent.

Also, a control target size should be as large as possible. This one is too small. Screenshot:

Step-by-step reproduction instructions

• Edit a page and click the Parent setting in the Inspector post panel.
• Alternatively, test on the storybook. Make sure the allowReset prop is set to true: https://wordpress.github.io/gutenberg/?path=/story/components-comboboxcontrol--default&args=allowReset:!true
• Choose a suggestion to make the Reset button enabled.
• Move focus to the button to visually see its size.
• Observe the button size is smaller than the one of other similar buttons.

Screenshots, screen recording, code snippet

No response

Environment info

No response

Please confirm that you have searched existing issues in the repo.

Yes

Please confirm that you have tested with all plugins deactivated except Gutenberg.

Yes