Issue #3444711: Add regions to build array to make contextual working

modules/ui_patterns_layouts/src/Plugin/Layout/ComponentLayout.php

@@ -48,6 +48,10 @@ class ComponentLayout extends LayoutDefault implements PluginFormInterface {
     foreach ($this->getPluginDefinition()->getRegionNames() as $region_name) {
       if (array_key_exists($region_name, $regions)) {
         $build['#slots'][$region_name] = $regions[$region_name];
+        // For layout builder we need to pass slots also
+        // direct to the build array. They are needed to generate contextual links
+        // and other surrounding markup.
+        $build[$region_name] = $regions[$region_name];
       }
     }
     return $build;