E2E/Playwright: MM-T5424 Find channel limit to 50 results (#23248)

* fix aria-label of Find Channels modal

* add components

* add test for MM-T5424

---------

Co-authored-by: Mattermost Build <build@mattermost.com>

e2e-tests/playwright/tests/visual/channels/intro_channel.spec.ts

@@ -2,7 +2,6 @@
 // See LICENSE.txt for license information.
 
 import {expect, test} from '@e2e-support/test_fixture';
-import {isSmallScreen} from '@e2e-support/util';
 
 test('Intro to channel as regular user', async ({pw, pages, browserName, viewport}, testInfo) => {
     // Create and sign in a new user
@@ -23,7 +22,7 @@ test('Intro to channel as regular user', async ({pw, pages, browserName, viewpor
     // await wait(duration.one_sec);
 
     // Wait for Playbooks icon to be loaded in App bar, except in iphone
-    if (!isSmallScreen(viewport)) {
+    if (!pw.isSmallScreen()) {
         await expect(channelsPage.appBar.playbooksIcon).toBeVisible();
     }