More dangling promise cleanup (#8518)

* More dangling promise cleanup

* return void

* Function to async

* Fix a couple missed promises

src/sql/workbench/browser/actions.ts

@@ -84,7 +84,7 @@ export class ConfigureDashboardAction extends Task {
 		});
 	}
 
-	runTask(accessor: ServicesAccessor): Promise<void> {
-		return accessor.get(IOpenerService).open(URI.parse(ConfigureDashboardAction.configHelpUri)).then();
+	async runTask(accessor: ServicesAccessor): Promise<void> {
+		accessor.get(IOpenerService).open(URI.parse(ConfigureDashboardAction.configHelpUri));
 	}
 }