Destroy idb worker when stopping client (#10899)

* Destroy idb worker when stopping client

* Iterate

* Iterate

* Iterate

src/Lifecycle.ts

@@ -940,6 +940,7 @@ export function stopMatrixClient(unsetClient = true): void {
         if (unsetClient) {
             MatrixClientPeg.unset();
             EventIndexPeg.unset();
+            cli.store.destroy();
         }
     }
 }

src/MatrixClientPeg.ts

@@ -194,6 +194,7 @@ class MatrixClientPegClass implements IMatrixClientPeg {
     private onUnexpectedStoreClose = async (): Promise<void> => {
         if (!this.matrixClient) return;
         this.matrixClient.stopClient(); // stop the client as the database has failed
+        this.matrixClient.store.destroy();
 
         if (!this.matrixClient.isGuest()) {
             // If the user is not a guest then prompt them to reload rather than doing it for them