Put cases menu link back, and some other things

modules/opencase_entities/opencase_entities.install

@@ -3,6 +3,18 @@
 
 use \Drupal\Core\Entity\Sql\SqlContentEntityStorageSchemaConverter;
 
+function opencase_entities_update_80197() {
+  //check if the table exists first.  If not, then create the entity.
+  if(!db_table_exists('oc_organisation')) {
+    \Drupal::entityTypeManager()->clearCachedDefinitions();
+    \Drupal::entityDefinitionUpdateManager()
+      ->installEntityType(\Drupal::entityTypeManager()->getDefinition('oc_organisation'));
+  }
+  else {
+    return 'Organisation entity already exists';
+  }
+}
+
 function opencase_entities_update_80192(&$sandbox) {
   $schema_converter = new SqlContentEntityStorageSchemaConverter(
     'oc_actor',