fix flaky test x-pack/test/functional/apps/dashboard/group2/panel_tim…

…e_range·ts (#150630)

Fixers #150490

flaky test runner
https://buildkite.com/elastic/kibana-flaky-test-suite-runner/builds/1899

Failures caused by settings panel not closing. PR resolves issue by
dismissing toasts so save button is clickable and retrying if settings
panel does not close.

<img width="500" alt="Screen Shot 2023-02-08 at 12 30 19 PM"
src="https://user-images.githubusercontent.com/373691/217639189-c1da31e8-b9d8-4d60-b95f-2e04b1d5c228.png">

---------

Co-authored-by: Kibana Machine <[email protected]>

test/functional/services/dashboard/panel_settings.ts

@@ -11,6 +11,8 @@ import { CommonlyUsed } from '../../page_objects/time_picker';
 
 export function DashboardCustomizePanelProvider({ getService }: FtrProviderContext) {
   const log = getService('log');
+  const retry = getService('retry');
+  const toasts = getService('toasts');
   const testSubjects = getService('testSubjects');
 
   return new (class DashboardCustomizePanel {
@@ -95,12 +97,19 @@ export function DashboardCustomizePanelProvider({ getService }: FtrProviderConte
 
     public async clickSaveButton() {
       log.debug('clickSaveButton');
-      await testSubjects.click('saveCustomizePanelButton');
+      await retry.try(async () => {
+        await toasts.dismissAllToasts();
+        await testSubjects.click('saveCustomizePanelButton');
+        await testSubjects.waitForDeleted('saveCustomizePanelButton');
+      });
     }
 
     public async clickCancelButton() {
       log.debug('clickCancelButton');
-      await testSubjects.click('cancelCustomizePanelButton');
+      await retry.try(async () => {
+        await testSubjects.click('cancelCustomizePanelButton');
+        await testSubjects.waitForDeleted('cancelCustomizePanelButton');
+      });
     }
 
     public async clickToggleShowCustomTimeRange() {