Add welcome screen disabling to common page

test/functional/page_objects/common_page.ts

@@ -73,6 +73,13 @@ export function CommonPageProvider({ getService, getPageObjects }: FtrProviderCo
       const loginPage = currentUrl.includes('/login');
       const wantedLoginPage = appUrl.includes('/login') || appUrl.includes('/logout');
 
+      // Disable the welcome screen if the corresponding environment variable is set
+      // This is relevant for environments which don't allow to use the yml setting, e.g. cloud production
+      // It is done here so it applies to logins but also to a login re-use
+      if (process.env.DISABLE_WELCOME_SCREEN) {
+        await browser.setLocalStorageItem('home:welcome:show', 'false');
+      }
+
       if (loginPage && !wantedLoginPage) {
         log.debug('Found login page');
         if (config.get('security.disableTestUser')) {

x-pack/test/functional/page_objects/security_page.js

@@ -31,10 +31,6 @@ export function SecurityPageProvider({ getService, getPageObjects }) {
 
       await PageObjects.common.navigateToApp('login');
 
-      // ensure welcome screen won't be shown. This is relevant for environments which don't allow
-      // to use the yml setting, e.g. cloud
-      await browser.setLocalStorageItem('home:welcome:show', 'false');
-
       await testSubjects.setValue('loginUsername', username);
       await testSubjects.setValue('loginPassword', password);
       await testSubjects.click('loginSubmit');