Removing the @global block type in favour of the @app block type in theme sections

In order for theme sections to accept app blocks, the section must define a block of type @app in its schema.

A number of development shops have been created using a pre-release version of Shopify's Dawn theme. The pre-release defines blocks of type @global in some of the sections (sections/apps.liquid, sections/main-product.liquid) to indicate that those sections support app blocks.

Moving forward, @global is removed and being replaced by @app. For more information about the @app block type, refer to add support for app blocks to sections. In order to make sure your theme sections work correctly, follow one of the recommendations:

• Download the latest version of Dawn and upload it to your store.
• Update the affected theme sections to use the @app instead of the @global block type.