fix(thumbnail-view-defaults): Capture field_options not existing

There are three states we're targeting here:
  1.  A new view where the default should be that show_thumbnail is on
  2.  A previously saved view where they might have enabled or disabled
      show_thumbnail
  3.  An existing view that was there before these options were
      presented (no config options set)

We want to make sure that the default behavior is that where appropriate
cards display thumbnails by default until they opt out.  This attempt to
determine if there's no config at all (existing view before update) and
sets the thumbnail option accordingly.

web/profiles/custom/yalesites_profile/modules/custom/ys_views_basic/src/ViewsBasicManager.php

@@ -399,10 +399,13 @@ public function getView($type, $params) {
 
     $eventTimePeriod = $paramsDecoded['filters']['event_time_period'] ?? NULL;
 
+    // Determine if we are in a state where field_options doesn't yet exist (pre-existing view)
+    $no_field_display_options_saved = !key_exists('field_options', $paramsDecoded) || !is_array($paramsDecoded['field_options']);
+
     $field_display_options = [
       'show_categories' => (int) !empty($paramsDecoded['field_options']['show_categories']),
       'show_tags' => (int) !empty($paramsDecoded['field_options']['show_tags']),
-      'show_thumbnail' => (int) !empty($paramsDecoded['field_options']['show_thumbnail']),
+      'show_thumbnail' => (int) $no_field_display_options_saved || !empty($paramsDecoded['field_options']['show_thumbnail']),
     ];
 
     $view->setArguments(