Tooltip detatch too soon on mobile click (#5598)

* Tooltip detatch too soon on mobile click

* Fixed syntax error

public/app/plugins/panel/singlestat/module.ts

@@ -538,7 +538,9 @@ class SingleStatCtrl extends MetricsPanelCtrl {
 
       elem.mouseleave(function() {
         if (panel.links.length === 0) { return;}
-        drilldownTooltip.detach();
+        $timeout(function() {
+          drilldownTooltip.detach();
+        });
       });
 
       elem.click(function(evt) {