fix closing search dropdown (#1142)

* using a different library for javascript selects, fixing the closing search dropdown
* fix closing dropdown for daterangepicker
* added missing search button for mobile on customer page
* fix meta fields with same names than existing columns

src/Form/Toolbar/ExportToolbarForm.php

@@ -21,11 +21,6 @@ use Symfony\Component\OptionsResolver\OptionsResolver;
  */
 class ExportToolbarForm extends AbstractToolbarForm
 {
-    protected function getSelectpickerConfig(): bool
-    {
-        return true;
-    }
-
     /**
      * {@inheritdoc}
      */