Unmount on pagehide instead of beforeunload

It seems cluster onbeforeunload is not triggered when iframe is removed from dom by the parent (when disconnecting a cluster).

While on root/main frame the beforeunload event does work, it seems to be adviced to use pagehide instead.

Signed-off-by: Sami Tiilikainen <97873007+samitiilikainen@users.noreply.github.com>

packages/core/src/renderer/frames/cluster-frame/init-cluster-frame/init-cluster-frame.ts

@@ -73,7 +73,7 @@ export const initClusterFrame = ({
       });
     });
 
-    window.onbeforeunload = () => {
+    window.onpagehide = () => {
       logger.info(
         `${logPrefix} Unload dashboard, clusterId=${(hostedCluster.id)}, frameId=${frameRoutingId}`,
       );

packages/core/src/renderer/frames/root-frame/init-root-frame.injectable.ts

@@ -57,7 +57,7 @@ const initRootFrameInjectable = getInjectable({
 
       registerIpcListeners();
 
-      window.addEventListener("beforeunload", () => {
+      window.addEventListener("pagehide", () => {
         logger.info("[ROOT-FRAME]: Unload app");
 
         unmountRoot();