Feature: #87435 - Make new content element wizard items' sort order configurable

Description

It is now possible to set the order of content elements inside the wizard tabs in the new content element wizard by setting before and after values in Page TSconfig.

Previously, the order of tabs could be configured but not the order of individual content elements inside a tab. This feature extends the existing ordering mechanism to individual content elements, following the same pattern as tab ordering.

This eliminates the need for workarounds, such as creating custom wizard groups to reorder elements.

Example

mod.wizards.newContentElement.wizardItems {
    default.elements {
        textmedia {
            after = header
        }
        mask_article_card {
            after = textmedia
        }
        # Multiple elements can be specified (comma-separated)
        mask_article_list {
            after = header,textmedia
        }
        # Or use before
        header {
            before = textmedia
        }
    }
}

Impact

Integrators and developers can now set the exact order of content elements inside each wizard tab using Page TSconfig, without needing to create custom wizard groups. The ordering mechanism follows the same syntax and behavior as the existing tab ordering feature (forge#71876), ensuring consistency and familiarity.

This feature works alongside existing tab ordering: tabs can be ordered using before and after at the group level, and content elements inside each tab can be ordered using before and after at the element level.

If before and after configuration is not specified for elements, they retain their default order, typically the order defined in TCA.