Fix flake in room-security-tab (#33897)

* Fix flake in room-security-tab

Wait for the power level change before trying to test.

* lint

apps/web/playwright/e2e/settings/room-settings/room-security-tab.spec.ts

@@ -24,7 +24,7 @@ test.describe("Roles & Permissions room settings tab", () => {
             power_level_content_override: {
                 events: {
                     // Set the join rules as lower than the history vis to test an edge case.
-                    ["m.room.join_rules"]: 80,
+                    ["m.room.join_rules"]: 50,
                     ["m.room.history_visibility"]: 100,
                 },
             },
@@ -99,14 +99,22 @@ test.describe("Roles & Permissions room settings tab", () => {
             const ourComboBox = settings.getByRole("combobox", { name: user.userId });
             await ourComboBox.selectOption("Custom level");
             const ourPl = settings.getByRole("spinbutton", { name: user.userId });
-            await ourPl.fill("80");
+            await ourPl.fill("50");
             await page.keyboard.press("Tab"); // Shows a warning on
 
             // Accept the de-op
             await page.getByRole("button", { name: "Continue" }).click();
             await settings.getByRole("button", { name: "Apply", disabled: false }).click();
 
-            await app.settings.switchTab("Security & Privacy");
+            // Close and await power level
+            await app.settings.closeDialog();
+            const timeline = page.getByTestId("timeline");
+            await timeline.getByRole("button", { name: "expand" }).click();
+            await expect(
+                timeline.getByText("Alice changed the power level of Alice from Admin to Moderator."),
+            ).toBeInViewport();
+
+            settings = await app.settings.openRoomSettings("Security & Privacy");
 
             await settingsGroupAccess.getByText("Invite only").click();
             // Element should have automatically set the room to "sharing" history visibility