Add graph-rounded css selector class

Author: Kristan Kenney

install/deb/themes/dark.css

@@ -1464,6 +1464,10 @@ form#vstobjects.suspended {
   color: #cacaca !important; 
 }
 
+.graph-rounded {
+  border-radius: 8px;
+}
+
 .body-rrd .units .l-unit {
   background-color: #282828 !important;
   border-left: 1px solid transparent !important;

web/templates/admin/list_rrd.html

@@ -56,7 +56,7 @@
           </div>
 
          <div>
-          <a href="/list/rrd/image.php?/rrd/<?php echo $data[$key]['TYPE']."/".$period."-".$data[$key]['RRD'].".png"?>" target="_blank"><img src="/list/rrd/image.php?/rrd/<?=$data[$key]['TYPE']."/".$period."-".$data[$key]['RRD'].".png"?>"></a>
+          <a href="/list/rrd/image.php?/rrd/<?php echo $data[$key]['TYPE']."/".$period."-".$data[$key]['RRD'].".png"?>" target="_blank"><img class="graph-rounded" src="/list/rrd/image.php?/rrd/<?=$data[$key]['TYPE']."/".$period."-".$data[$key]['RRD'].".png"?>"></a>
          </div>
 
         </div>