fix: heatmap popup showing after logging out (#761)

* fix for heatmap popup showing after logging out

* moved node.remove to component unmount

* Update web/src/components/UsageHeatMap.tsx

Co-authored-by: boojack <stevenlgtm@gmail.com>

Co-authored-by: M. Gschwandtner <84477901+OnlyPain-ctrl@users.noreply.github.com>
Co-authored-by: boojack <stevenlgtm@gmail.com>

web/src/components/UsageHeatMap.tsx

@@ -58,6 +58,10 @@ const UsageHeatMap = () => {
       .catch((error) => {
         console.error(error);
       });
+
+    return () => {
+      handleUsageStatItemMouseLeave();
+    };
   }, [memos.length]);
 
   const handleUsageStatItemMouseEnter = useCallback((event: React.MouseEvent, item: DailyUsageStat) => {