Blog Stats Block: Add Transform from Legacy Widget

[Aurorum]

Follow-up to #34557

Proposed changes:

• Allows the existing Blog Stats widget to be converted into the new block, which also has superior customisation abilities

Jetpack product discussion

N/A.

Does this pull request change what data or activity we track or use?

No.

Testing instructions:

You'll want to remove this first so that the Legacy Widget still appears:

jetpack/projects/plugins/jetpack/modules/widgets/blog-stats.php

Lines 44 to 56 in e94d76d

	add_filter( 'widget_types_to_hide_from_legacy_widget_block', array( $this, 'hide_widget_in_block_editor' ) );
	}
	/**
	* Remove the "Blog Stats" widget from the Legacy Widget block
	*
	* @param array $widget_types List of widgets that are currently removed from the Legacy Widget block.
	* @return array $widget_types New list of widgets that will be removed.
	*/
	public function hide_widget_in_block_editor( $widget_types ) {
	$widget_types[] = 'blog-stats';
	return $widget_types;
	}

You can then add it to your site, and confirm that you can transform the block (press the calendar icon in the top left). The label should stay the same, and it should create a heading if you already have a widget title.

cc @kangzj - sorry, should have added it to start with but #34717 reminded me!

[github-actions]

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[kangzj]

It tests well for me 👍

Note: I had to enable 'Extra sidebar widgets' from /wp-admin/admin.php?page=jetpack_modules&module_tag=Appearance to be able to add the legacy widget.