Remove confusing icons from Content / Wide layout settings

[afercia]

Description

In the editor there is a design convention where some controls do have an associated button that 'does something'. IN some cases, it switches the control to an alternative version, in other cases it performs other actions. The button is generally placed after the control.

This pattern establishes a pretty clear convention and it makes sense as the action button is logically and visually placed after the control.

Instead, the 'Content' and 'Wide' sizes settings in Site Eitor > Styles > Layout do have an icon placed after the control but it's just an icon. It's an ornamental icon. There's no button to perform any action.

As a used, I was pretty confused and I did try to click those icons. I thought they were buttons.

These icons break the convention described above. They are unnecessary anr, more importantly, confusing. I'd like to propose to remove them entirely. Screenshot:

Step-by-step reproduction instructions

• Go to Site Eitor > Styles > Layout > Dimensions > Content / Wide
• Observe the icons placed after the controls are only non-interactive icons.

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

[afercia]

AdditionallyL

• The two ToolsPanelItem in this UI do have a label prop set that, as far as I can tell, doesn't do anything.
• Removing the icons could help with making these input use the __next40pxDefaultSize

[t-hamano]

In order to apply the 40-pixel size to the Content/Wide controls, removing these icons is suggested as one approach. Please see #64842.

The discussions exchanged here also give us an idea of the context.

[afercia]

Thanks @t-hamano for pointing me at the ongoing discussion about this issue. I'd totally agree with this comment:

#64520 (comment)

One drawback with this approach is that we now have decorative icons situated in a location where you often find interactive icon buttons. In other words those icons look clickable.

[afercia]

Closing in favor of #64842