Add image title field export, remove image loading setting

Fixes #3473318:

• Allow image title field export in views plugin
• Remove "image loading" setting from views plugin

src/Plugin/Field/FieldFormatter/ImageExportFormatter.php

@@ -39,32 +39,20 @@ class ImageExportFormatter extends ImageFormatter {
   public function settingsForm(array $form, FormStateInterface $formState): array {
     $form = parent::settingsForm($form, $formState);
     unset($form['image_link']);
-
-    $alt = $this->getFieldSetting('alt_field');
-    $title = $this->getFieldSetting('title_field');
-
-    if ($alt) {
-      $form['export_alt'] = [
-        '#type'          => 'checkbox',
-        '#title'         => $this->t('Export <em>Alt</em> field'),
-        '#description'   => $this->t('Enabling this will export an object instead of a string.'),
-        '#default_value' => $this->getSetting('export_alt'),
-      ];
-    }
-    else {
-      $form['export_alt'] = ['#type' => 'value', '#value' => FALSE];
-    }
-    if ($title) {
-      $form['export_title'] = [
-        '#type'          => 'checkbox',
-        '#title'         => $this->t('Export <em>Title</em> field'),
-        '#description'   => $this->t('Enabling this will export an object instead of a string.'),
-        '#default_value' => $this->getSetting('export_title'),
-      ];
-    }
-    else {
-      $form['export_title'] = ['#type' => 'value', '#value' => FALSE];
-    }
+    unset($form['image_loading']);
+
+    $form['export_alt'] = [
+      '#type'          => 'checkbox',
+      '#title'         => $this->t('Export <em>Alt</em> field'),
+      '#description'   => $this->t('Enabling this will export an object instead of a string.'),
+      '#default_value' => $this->getSetting('export_alt'),
+    ];
+    $form['export_title'] = [
+      '#type'          => 'checkbox',
+      '#title'         => $this->t('Export <em>Title</em> field'),
+      '#description'   => $this->t('Enabling this will export an object instead of a string.'),
+      '#default_value' => $this->getSetting('export_title'),
+    ];
 
     return $form;
   }