Issue #2587185 by jcnventura, Chi, swentel: Use number FAPI element in number field settings form

core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/DecimalFormatter.php

@@ -52,11 +52,11 @@ public function settingsForm(array $form, FormStateInterface $form_state) {
       '#default_value' => $this->getSetting('decimal_separator'),
       '#weight' => 5,
     );
-    $range = range(0, 10);
     $elements['scale'] = array(
-      '#type' => 'select',
+      '#type' => 'number',
       '#title' => t('Scale', array(), array('context' => 'decimal places')),
-      '#options' => array_combine($range, $range),
+      '#min' => 0,
+      '#max' => 10,
       '#default_value' => $this->getSetting('scale'),
       '#description' => t('The number of digits to the right of the decimal.'),
       '#weight' => 6,

core/lib/Drupal/Core/Field/Plugin/Field/FieldType/DecimalItem.php

@@ -69,20 +69,21 @@ public function storageSettingsForm(array &$form, FormStateInterface $form_state
     $element = array();
     $settings = $this->getSettings();
 
-    $range = range(10, 32);
     $element['precision'] = array(
-      '#type' => 'select',
+      '#type' => 'number',
       '#title' => t('Precision'),
-      '#options' => array_combine($range, $range),
+      '#min' => 10,
+      '#max' => 32,
       '#default_value' => $settings['precision'],
       '#description' => t('The total number of digits to store in the database, including those to the right of the decimal.'),
       '#disabled' => $has_data,
     );
-    $range = range(0, 10);
+
     $element['scale'] = array(
-      '#type' => 'select',
+      '#type' => 'number',
       '#title' => t('Scale', array(), array('context' => 'decimal places')),
-      '#options' => array_combine($range, $range),
+      '#min' => 0,
+      '#max' => 10,
       '#default_value' => $settings['scale'],
       '#description' => t('The number of digits to the right of the decimal.'),
       '#disabled' => $has_data,