Product Editor: Block switcher toolbar icon is present for blocks using toolbar, with Gutenberg 18.1

[mattsherman]

Issue Description:

With Gutenberg 18.1 (or trunk), a change was made in WordPress/gutenberg#60010 that causes the block switcher toolbar icon to be present for blocks using the toolbar (such as summary and description), as well as a hover outline.

Gutenberg 18.1

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Descirption:

Gutenberg 18 or older

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Technical Considerations

We could consider introducing a change upstream in Gutenberg to force the block switcher to never appear. Whether that would be welcomed is unknown. This certainly is yet another example of how assumptions on what a "block editor" is can make their way into packages such as @wordpress/block-editor. Or, perhaps we are making assumptions on what a "block editor" is, and we really shouldn't be using @wordpress/block-editor at all.

Another approach, which would be rather fragile and prone to future breakage, could be to use CSS to target and hide the block switcher toolbar icon.