fixes #7084 show pointer curser only on sparklines that are linked to a graph

plugins/CoreHome/javascripts/sparkline.js

@@ -42,6 +42,9 @@ window.initializeSparklines = function () {
 
         // try to find sparklines and add them clickable behaviour
         graph.parent().find('div.sparkline').each(function () {
+
+            $(this).addClass('linked');
+
             // find the sparkline and get it's src attribute
             var sparklineUrl = $('img', this).attr('data-src');
 

plugins/CoreHome/stylesheets/sparklineColors.less

@@ -3,7 +3,7 @@ div.sparkline {
     border-bottom: 1px solid white;
 }
 
-div.sparkline:hover {
+div.sparkline.linked:hover {
     cursor: pointer;
     border-bottom: 1px dashed #c3c3c3;
 }