I would like to propose a change to allow the use of custom shortcodes in the scrolling-text widget. Would be nice to see this in a next release!

Add a filter to Salient-core, to allow shortcodes in the scrolling-text shortcode.
File: plugins/salient-core/includes/vc-templates/nextar_scrolling_text.php line#101

$inner_content = apply_filters('nectar-scrolling-text-content', $inner_content);

The customer can put this code in his functions.php to filter the content of the scroller (and thus also allow shortcodes)

function scolling_text_allow_shortcodes( $s ) {
    return do_shortcode($s);
}
add_filter( 'nectar-scrolling-text-content', 'scolling_text_allow_shortcodes', 10, 3 );