Check for trigger URL to simply redirect to root

This is required for Authentic Theme 19.00+

https://github.com/qooob/authentic-theme/issues/844
https://github.com/qooob/authentic-theme/issues/848

web-lib-funcs.pl

@@ -4686,6 +4686,11 @@ if ($module_name && !$main::no_acl_check &&
 		}
 	$main::no_acl_check++;
 	}
+	
+# Check for trigger URL to simply redirect to root: required for Authentic Theme 19.00+
+if ($ENV{'REQUEST_URI'} =~ /xnavigation=1/) {
+	redirect($gconfig{'webprefix'} || "/");
+	}
 
 # Check the Referer: header for nasty redirects
 my @referers = split(/\s+/, $gconfig{'referers'});