[FIX] spreadsheet_oca: Crash when editing and leaving spreadsheet quickly

When editing a spreadsheet, inserting a pivot or list or making signficant changes, exiting quickly could intermittently cause a race condition where saving does not have enough time to complete.
After reloading the record, it crashes with an OWL error "Component Destroyed".
This fixes the issue by awaiting the save methods before exiting.

Author: chrisandrewmann

spreadsheet_oca/static/src/spreadsheet/bundle/spreadsheet_renderer.esm.js

@@ -174,20 +174,17 @@ export class SpreadsheetRenderer extends Component {
             this.stores.inject(ModelStore, this.spreadsheet_model);
         });
         useSetupAction({
-            beforeLeave: () => {
-                this.onSpreadsheetSaved();
-                return Promise.resolve();
-            },
+            beforeLeave: this.onSpreadsheetSaved.bind(this),
         });
         odooDataProvider.addEventListener("data-source-updated", () => {
             const sheetId = this.spreadsheet_model.getters.getActiveSheetId();
             this.spreadsheet_model.dispatch("EVALUATE_CELLS", {sheetId});
         });
     }
-    onSpreadsheetSaved() {
+    async onSpreadsheetSaved() {
         const data = this.spreadsheet_model.exportData();
-        this.env.saveRecord({spreadsheet_raw: data});
-        this.spreadsheet_model.leaveSession();
+        await this.env.saveRecord({spreadsheet_raw: data});
+        await this.spreadsheet_model.leaveSession();
         this.spreadsheet_model.off("update", this);
     }
     async downloadAsXLXS() {