Fixed #4291 dashboard

Author: Till Brehm

interface/web/dashboard/dashboard.php

@@ -188,13 +188,13 @@
 $dashlets_config[$role.'_dashlets_left'] = trim($dashlets_config[$role.'_dashlets_left']);
 $dashlets_config[$role.'_dashlets_right'] = trim($dashlets_config[$role.'_dashlets_right']);
 
-if($dashlets_config[$role.'_dashlets_left'] != ''){
+if($dashlets_config[$role.'_dashlets_left'] != '' || $dashlets_config[$role.'_dashlets_right'] != ''){
 	preg_match_all('@\[(.*?)\]@', $dashlets_config[$role.'_dashlets_left'], $matches);
 	$leftcol_dashlets = $matches[1];
 } else {
 	$leftcol_dashlets = $default_leftcol_dashlets;
 }
-if($dashlets_config[$role.'_dashlets_right'] != ''){
+if($dashlets_config[$role.'_dashlets_right'] != '' || $dashlets_config[$role.'_dashlets_left'] != ''){
 	preg_match_all('@\[(.*?)\]@', $dashlets_config[$role.'_dashlets_right'], $matches);
 	$rightcol_dashlets = $matches[1];
 } else {