More E2E tests

[gweiying]

Directory - desktop view

• It should redirect to the short url link when the row is clicked for active link

Directory - mobile view

• It should redirect to the short url link when the redirect icon is clicked for active link in bottom mobile panel

Redirection

• It should redirect to the long url when short url is active
• It should redirect to a 404 page when short url is inactive

Drawer, Editing and Toaster logic

• It should redirect to the amended file immediately when the file is replaced (any caching for that short url is cleared)

User page

• User message banner appears on top when USER_MESSAGE env var is set
• Announcement modal appears when ANNOUNCEMENT_* env var is set