Bulk export improvements (#871)

- Open direct bulk export to ”<option>Main” target (i.e. new tab/window) like the single record exports
- Trigger the change function for the initially selected option for consistency

themes/bootstrap3/templates/cart/export.phtml

@@ -58,13 +58,20 @@
   $script = <<<JS
   $('button.btn.hidden').removeClass('hidden');
   $('#itemhide').removeClass('in');
+  $('.export.btn').click(function exportButtonClick() {
+    if (typeof $('#format option:selected').attr('data-redirect') !== 'undefined') {
+      VuFind.modal('hide');
+    }
+  });
   $('#format').change(function exportFormatChange(e) {
     if (this.selectedOptions[0].getAttribute('data-redirect') === null) {
       $('.export.btn').removeAttr('data-lightbox-ignore');
+      $('form[name=exportForm]').removeAttr('target');
     } else {
       $('.export.btn').attr('data-lightbox-ignore', '1');
+      $('form[name=exportForm]').attr('target', this.selectedOptions[0].value + 'Main');
     }
-  });
+  }).trigger('change');
 JS;
 ?>
-<?=$this->inlineScript(\Zend\View\Helper\HeadScript::SCRIPT, $script, 'SET') ?>
+<?=$this->inlineScript(\Zend\View\Helper\HeadScript::SCRIPT, $script, 'SET') ?>