total shortlisted candidates

Dear, what is 'drop down menu of admin' please send for me a screenshot, i will check to help you.

Best regards.

You want display like attachment ? please switch your site to use Jobica child theme, then copy file 'user-menu.php' from 'themes/jobica/layouts' theme paste to 'jobica-child/layouts/user-menu.php' then you can add custom Custom code in file jobica-child/layouts/user-menu.php like attachment
Code is:

<?php 
$current_user           = wp_get_current_user();
$list_resume_shortlist  = get_user_meta( $current_user->ID, 'list_resume_shortlist', true );

if ( empty( $list_resume_shortlist ) || !is_array( $list_resume_shortlist ) ) {
	$list_resume_shortlist = array();
}
$shortlists = get_posts(array(
	'paged'         => -1,
	'post_type'     => 'noo_resume',
	'post__in'      => array_merge($list_resume_shortlist, array(0)),
	'post_status'   => 'publish'
));
if(count($shortlists) > 0){
	echo '<span class="badge" style="position: relative;right: auto;top: -10px;">'.count($shortlists).'</span>';
}
?>

Sorry, but with Jobmonster you do same, Please switch your site to use Jobmonster child theme, then copy file 'user-menu.php' from 'themes/noo-jobmonster/layouts' theme paste to 'noo-jobmonster-child/layouts/user-menu.php' then you can add custom Custom code in file noo-jobmonster-child/layouts/user-menu.php like attachment
Code is:

<?php 
$current_user = wp_get_current_user();
$list_resume_shortlist = get_user_meta( $current_user->ID, 'list_resume_shortlist', true );

if ( empty( $list_resume_shortlist ) || !is_array( $list_resume_shortlist ) ) {
	$list_resume_shortlist = array();
}

$shortlists = get_posts(array(
	'paged'         => -1,
	'post_type'     => 'noo_resume',
	'post__in'      => array_merge($list_resume_shortlist, array(0)),
	'post_status'   => 'publish'
));
if(count($shortlists) > 0){
	echo '<span style="position: relative;right: auto;top: -10px;background-color: #ee5b4c;color: #fff;padding: 2px 6px;border-radius: 3px;font-size: 11px;">'.count($shortlists).'</span>';
}
?>