Style Admin Menu Separators.php

// Restyle admin menu separators
function dgs_separators() {
	echo '<style type="text/css">#adminmenu li.wp-menu-separator {margin: 0; background: #444;}</style>';
	echo '<style type="text/css">.editor-styles-wrapper .icon-bullet .wp-block-group__inner-container { display: inherit !important; }</style>';
}
add_action( 'admin_head', 'dgs_separators' );