Enqueue scripts on demand

There’s a check role_can_impersonate() before drawing the menu, so the same check can be used to avoid loading scripts.

function tikemp_scripts(){
	if( role_can_impersonate( ) ){
		wp_enqueue_script('tikemp_search_scroll', plugins_url( '/js/jquery.nicescroll.min.js', __FILE__ ), array( 'jquery' ),'1.1',true);
		wp_enqueue_script('tikemp_script', plugins_url( '/js/script.js', __FILE__ ), array( 'jquery','tikemp_search_scroll' ),'1.2',true);
	}
}