app/views/admin/taxon_concepts/new.js.erb
var form = $("<%= escape_javascript(render('form')) %>");
form.find('.tags').select2();
$('#admin-new-<%= controller_name.singularize %>-form').html(form);
$('#new-<%= controller_name.singularize %>').modal('show');
window.adminEditor.initSelect2Inputs();