Fix eternal loading on metrics section

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

@@ -184,14 +184,15 @@ const MetricsSection: React.FunctionComponent<PropsType> = ({
       }
       i += 1;
     }
-    selectors.push(selector);
 
-    setIsLoading((prev) => prev + 1);
+    selectors.push(selector);
 
     if (selectors[0] === "") {
       return;
     }
 
+    setIsLoading((prev) => prev + 1);
+
     api
       .getMatchingPods(
         "<token>",