Suggestion: introduce a divider shortcode

I suggest you introduce a [divider] shortcode. In my copy of the plugin, I changed the code below line 162 as follows:

foreach($linklist as $a){
			if(strpos($a,"[divider]") !== false){
				$newarrayline = '[divider]';
			} else {
				$newarrayline = explode('|', $a);
				$newarrayline = array_map('trim', $newarrayline);
				if(sizeof($newarrayline)<3) continue;
			}
			
			array_push($finalarray, $newarrayline);
		}

		if(trim($list) != false) { ?>

			<table class="skip-dashboard-link-widget">
		<?php foreach ($finalarray as $dqlw_links){ 
			if(is_array($dqlw_links)){?>
				<tr valign="top">
				<td scope="row">
				<?php if(!empty($dqlw_links[3])){ ?>
				<i class="fa fa-lg <?php echo $dqlw_links[3]; ?>" aria-hidden="true"></i> &nbsp;
				<?php } ?>
				<?php echo $dqlw_links[0]; ?></td>
				<td><a href="<?php echo $dqlw_links[1]; ?>"  class="button-primary skip-dashboard-link-widget-button" target="<?php if(trim(esc_attr(get_option('dashboard_quick_link_widget_open_link')))=='on'){ echo "_blank"; }?>"><?php echo $dqlw_links[2]; ?></a></td>
				</tr>
			<?php
			} else {
				if($dqlw_links == '[divider]') echo '<tr><td colspan="2" style="padding:15px 0;"></td></tr><tr></tr>';
			} ?>
		<?php } ?>
			</table>
		<?php } ?>

Inserts 2 blank rows. Could be a horizontal line.