drupal/color_field: Fixes missing import declaration and some bad UI stuff

fix-color-field-module.patch

diff --git a/src/Plugin/Field/FieldFormatter/ColorFieldFormatterCss.php b/src/Plugin/Field/FieldFormatter/ColorFieldFormatterCss.php
index 053191a..f55e24d 100644
--- a/src/Plugin/Field/FieldFormatter/ColorFieldFormatterCss.php
+++ b/src/Plugin/Field/FieldFormatter/ColorFieldFormatterCss.php
@@ -8,6 +8,7 @@
 namespace Drupal\color_field\Plugin\Field\FieldFormatter;
 
 use Drupal\Core\Field\FormatterBase;
+use Drupal\Core\Field\FieldItemInterface;
 use Drupal\Core\Field\FieldItemListInterface;
 use Drupal\Core\Form\FormStateInterface;
 use Drupal\color_field\ColorHex;
@@ -69,6 +70,7 @@ class ColorFieldFormatterCss extends FormatterBase {
       '#options' => array(
         'background-color' => t('Background color'),
         'color' => t('Text color'),
+        'fill' => t('Fill color (SVG only)'),
       ),
     );
     $elements['important'] = array(
diff --git a/src/Plugin/Field/FieldWidget/ColorFieldWidgetHTML5.php b/src/Plugin/Field/FieldWidget/ColorFieldWidgetHTML5.php
index bb39cef..6d73a3a 100644
--- a/src/Plugin/Field/FieldWidget/ColorFieldWidgetHTML5.php
+++ b/src/Plugin/Field/FieldWidget/ColorFieldWidgetHTML5.php
@@ -64,27 +64,42 @@ class ColorFieldWidgetHTML5 extends WidgetBase {
       }
     }
 
-    $element['color'] = array(
-      '#title' => t('Color'),
-      '#type' => 'color',
-      '#maxlength' => 7,
-      '#size' => 7,
-      '#required' => $element['#required'],
-      '#default_value' => $color,
-    );
-
     if ($this->getFieldSetting('opacity')) {
-      $element['color']['#prefix'] = '<div class="container-inline">';
 
-      $element['opacity'] = array(
+      $details = [
+          '#type' => 'details',
+          '#open' => TRUE,
+        ] + $element;
+
+      $details['color'] = [
+        '#prefix' => '<div class="container-inline">',
+        '#title' => t('Color'),
+        '#type' => 'color',
+        '#maxlength' => 7,
+        '#size' => 7,
+        '#required' => $element['#required'],
+        '#default_value' => $color,
+      ];
+
+      $details['opacity'] = [
+        '#suffix' => '</div>',
         '#title' => t('Opacity'),
         '#type' => 'textfield',
         '#maxlength' => 4,
         '#size' => 4,
         '#required' => $element['#required'],
         '#default_value' => isset($items[$delta]->opacity) ? $items[$delta]->opacity : NULL,
-        '#suffix' => '</div>',
-      );
+      ];
+
+      $element = $details;
+
+    } else {
+      $element['color'] = [
+          '#type' => 'color',
+          '#maxlength' => 7,
+          '#size' => 7,
+          '#default_value' => $color,
+        ] + $element;
     }
 
     return $element;