L&L 3.1.3: WP Grid Builder integration

Hi Emmanuel,

Since WP Grid Builder doesn’t use the global wp_query system that L&L relies on to figure out its context and didn’t provide any reasonable way for us to work around it, we actually went ahead and added a WP Grid Builder block you can use to select an existing L&L template similar to the one provided for Gutenberg, Elementor & Beaver Builder. The only difference is that you can’t write L&L code directly in WP Grid Builder, you can only select an existing saved template.