Prevent get pods query to go if empty selectors

dashboard/src/main/home/cluster-dashboard/expanded-chart/metrics/MetricsSection.tsx

@@ -187,6 +187,10 @@ const MetricsSection: React.FunctionComponent<PropsType> = ({
 
     setIsLoading((prev) => prev + 1);
 
+    if (selectors[0] === "") {
+      return;
+    }
+
     api
       .getMatchingPods(
         "<token>",