Adding weight to display plugins.

src/Annotation/EntityEmbedDisplay.php

@@ -44,4 +44,9 @@ class EntityEmbedDisplay extends Plugin {
    */
   public $entity_types = FALSE;
 
+  /**
+   * @var int
+   */
+  public $weight = 0;
+
 }

src/EntityEmbedDisplay/EntityEmbedDisplayManager.php

@@ -79,6 +79,7 @@ public function getDefinitionsForContexts(array $contexts = array()) {
     });
     $definitions_for_context = array_intersect_key($definitions, array_flip($valid_ids));
     $this->moduleHandler->alter('entity_embed_display_plugins_for_context', $definitions_for_context, $contexts);
+    uasort($definitions_for_context, 'Drupal\Component\Utility\SortArray::sortByWeightElement');
     return $definitions_for_context;
   }
 

src/Form/EntityEmbedDialog.php

@@ -566,7 +566,7 @@ public function getDisplayPluginOptions(EmbedButtonInterface $embed_button, Enti
       $plugins = array_intersect_key($plugins, array_flip($allowed_plugins));
     }
 
-    natsort($plugins);
+    //natsort($plugins);
     return $plugins;
   }
 }

src/Plugin/entity_embed/EntityEmbedDisplay/FileFieldFormatter.php

@@ -18,7 +18,8 @@
  *   entity_types = {"file"},
  *   deriver = "Drupal\entity_embed\Plugin\Derivative\FieldFormatterDeriver",
  *   field_type = "file",
- *   provider = "file"
+ *   provider = "file",
+ *   weight = -10
  * )
  */
 class FileFieldFormatter extends EntityReferenceFieldFormatter {

src/Plugin/entity_embed/EntityEmbedDisplay/ImageFieldFormatter.php

@@ -24,7 +24,8 @@
  *   entity_types = {"file"},
  *   deriver = "Drupal\entity_embed\Plugin\Derivative\FieldFormatterDeriver",
  *   field_type = "image",
- *   provider = "image"
+ *   provider = "image",
+ *   weight = -20
  * )
  */
 class ImageFieldFormatter extends FileFieldFormatter {