Dashboard schema: Review and mature refresh property (#62104)

* Review and mature refresh property

* Update type

* Update report

public/app/features/dashboard/components/DashboardPrompt/DashboardPrompt.test.tsx

@@ -8,7 +8,6 @@ import { hasChanges, ignoreChanges } from './DashboardPrompt';
 
 function getDefaultDashboardModel() {
   return createDashboardModelFixture({
-    refresh: false,
     panels: [
       createPanelJSONFixture({
         id: 1,
@@ -56,7 +55,7 @@ describe('DashboardPrompt', () => {
   it('Should ignore a lot of changes', () => {
     const { original, dash } = getTestContext();
     dash.time = { from: '1h' };
-    dash.refresh = true;
+    dash.refresh = '30s';
     dash.schemaVersion = 10;
     expect(hasChanges(dash, original)).toBe(false);
   });

public/app/features/dashboard/components/DashboardPrompt/DashboardPrompt.tsx

@@ -178,7 +178,7 @@ function cleanDashboardFromIgnoredChanges(dashData: Dashboard) {
 
   // ignore time and refresh
   dash.time = 0;
-  dash.refresh = 0;
+  dash.refresh = '';
   dash.schemaVersion = 0;
   dash.timezone = 0;
 

public/app/features/dashboard/state/DashboardModel.ts

@@ -86,7 +86,7 @@ export class DashboardModel implements TimeModel {
   templating: { list: any[] };
   private originalTemplating: any;
   annotations: { list: AnnotationQuery[] };
-  refresh: any;
+  refresh: string;
   snapshot: any;
   schemaVersion: number;
   version: number;
@@ -145,7 +145,7 @@ export class DashboardModel implements TimeModel {
     this.liveNow = Boolean(data.liveNow);
     this.templating = this.ensureListExist(data.templating);
     this.annotations = this.ensureListExist(data.annotations);
-    this.refresh = data.refresh;
+    this.refresh = data.refresh || '';
     this.snapshot = data.snapshot;
     this.schemaVersion = data.schemaVersion ?? 0;
     this.fiscalYearStartMonth = data.fiscalYearStartMonth ?? 0;