reduce flakes in x-ray test (#33420)

e2e/test/scenarios/dashboard/x-rays.cy.spec.js

@@ -106,10 +106,12 @@ describe("scenarios > x-rays", () => {
       });
 
       startNewQuestion();
-      // eslint-disable-next-line no-unscoped-text-selectors -- deprecated usage
-      cy.findByText("Saved Questions").click();
-      // eslint-disable-next-line no-unscoped-text-selectors -- deprecated usage
-      cy.findByText("15655").click();
+
+      popover().within(() => {
+        cy.findByText("Saved Questions").click();
+        cy.findByText("15655").click();
+      });
+
       visualize();
       summarize();
       getDimensionByName({ name: "SOURCE" }).click();
@@ -119,14 +121,14 @@ describe("scenarios > x-rays", () => {
       cy.button("Done").click();
       cy.get(".bar").first().click({ force: true });
 
-      // eslint-disable-next-line no-unscoped-text-selectors -- deprecated usage
-      cy.findByText("Automatic insights…").click();
-      // eslint-disable-next-line no-unscoped-text-selectors -- deprecated usage
-      cy.findByText(action).click();
+      popover().within(() => {
+        cy.findByText("Automatic insights…").click();
+        cy.findByText(action).click();
+      });
 
-      for (let c = 0; c < XRAY_DATASETS; ++c) {
-        cy.wait("@postDataset");
-      }
+      cy.wait(Array(XRAY_DATASETS).fill("@postDataset"), {
+        timeout: 15 * 1000,
+      });
 
       cy.wait("@xray").then(xhr => {
         expect(xhr.response.body.cause).not.to.exist;