DashboardScene: Fixes issue saving new dashboard from panel edit (#86477)

public/app/features/dashboard-scene/scene/DashboardScene.test.tsx

@@ -102,6 +102,27 @@ describe('DashboardScene', () => {
       });
     });
 
+    describe('Given new dashboard in edit mode', () => {
+      it('when saving it should clear isNew state', () => {
+        const scene = buildTestScene({
+          meta: { isNew: true },
+        });
+
+        scene.activate();
+        scene.onEnterEditMode();
+        scene.saveCompleted({} as Dashboard, {
+          id: 1,
+          slug: 'slug',
+          uid: 'dash-1',
+          url: 'sss',
+          version: 2,
+          status: 'aaa',
+        });
+
+        expect(scene.state.meta.isNew).toBeFalsy();
+      });
+    });
+
     describe('Given scene in edit mode', () => {
       let scene: DashboardScene;
       let deactivateScene: () => void;

public/app/features/dashboard-scene/scene/DashboardScene.tsx

@@ -252,6 +252,7 @@ export class DashboardScene extends SceneObjectBase<DashboardSceneState> {
         url: result.url,
         slug: result.slug,
         folderUid: folderUid,
+        isNew: false,
       },
     });