test better emoji removal

booking.admin.inc

@@ -345,6 +345,16 @@ function booking_admin() {
     '#options' => array(0 => t('No'), t('Yes')),
     '#default_value' => variable_get('booking_studygroup_csv_ages', 0),
   );   
+  $form['features']['booking_enable_emoji_removal'] = array(
+    '#type' => 'radios',
+    '#title' => t('Remove emoji from user input?'),
+    '#description' => t('Select whether to strip emoji from user input before saving to database. Useful if mysql does not support utf8mb4.'),
+    '#options' => array(
+      0 => t('No'),
+      t('Yes')
+    ),
+    '#default_value' => variable_get('booking_enable_emoji_removal', 1)
+  );  
   $form['misc'] = array(
     '#type' => 'fieldset',
     '#title' => 'Configuration Options'