Simplified the `__experimentalUseGlobalBehaviors` function by removing the 'source' parameter. Now, the function directly uses 'userConfig' for getting raw data and 'mergedConfig' for variable value.

…n of updates to the lightbox UI

Previously, the test was checking whether schema properties array had exactly 10 elements
We're now checking for exactly 9 elements instead.

…s-panels

Simplified the ImageSettingsPanel and ScreenBlock components. More specific changes:
 - Removed `name` and `settings` from the ImageSettingsPanel
 - Use `userSettings` instead of `settings` in the ImageSettingsPanel
 - Modified `onChangeLightbox` logic, it now takes a new setting instead of a boolean and directly passes to `onChange`
 - Updated the ScreenBlock component to account for this refactor

A new option has been added to the lightbox settings in the Theme JSON reference guide and Gutenberg class. This `showUI` option allows users to toggle whether the Lightbox UI is displayed in the block editor or not. Also, updated the JSON schema accordingly to reflect these changes in theme.json files.

I moved the logic to determine whether the lightbox should display
or not to two render_block_data filters.

One of these filters is inside of the index.php
so that itc can exist in WP core, the other inside of blocks.php
in order to offer legacy support for the Behaviors syntax in
the Gutenberg plugin.

Using the render_block_data instead of render_block allows us to
store a 'lightboxEnabled' value on the block, which we can use to
determine whether the lightbox should be rendered in these two
separate locations relatively cleanly without needing to touch
the markup.

I added behaviors back to the valid top-level keys so that we can
read it to offer legacy support.

Lastly, I set the lightbox.enabled attribute to NULL by default
so that we can determine whether the Behaviors syntax should override
it or not.

…ock editor UI should inherit the value from `theme.json`.

Likewise, if no value is set in the block attributes, the block editor UI should inherit the value from the Global Styles of the Image.

…s-panels

I needed to add 'behaviors' back to the block.json attributes
in order to read them on the JavaScript side in the editor
to fire the deprecation notice.

Behaviors are deprecated for 2 more releases and will be removed then.

…s-panels

…json."

This reverts commit cabe31b.

…s-panels

…s-panels

 into `class-wp-theme-json-schema-gutenberg.php`

…s/gutenberg into update/lightbox-settings-panels

…mpler syntax used by the lightbox.

…s-panels

…k_supports

…anel.js

By default, we read the lightbox settings underneath the 'core/image'
in theme.json; however, the 'enabled' property there is undefined by default,
which means it should be possible to declare a top-level setting for the lightbox
that overrides an undefined block-level setting.

While this appeared to be working on the PHP side, the UI wasn't accurately
reflecting this inheritance structure, so this commit fixes that.

Users should now be able to define a top-level lightbox setting as either
'lightbox: true' or 'lightbox: { enabled: true }' that will be used
if the block-level lightbox setting for 'enabled' is undefined.

This reverts commit 2f5f122.

Rather than trying to check if the 'enabled' has been set or not
and falling back to other levels of the theme.json inheritance
structure, I decided to just read and use the settings as defined
in theme.json. This is the expected behavior in Gutenberg from
what I understand and has less edge cases.

Co-authored-by: Alex Lende <alex+github.com@lende.xyz>

…hp` is only put in GB as a temporary migration.

… an will be removed in a future version.

…s-panels

…to class-wp-theme-json-gutenberg.php