Don't show user avatar in snapshot tests (#2130)

* Make user avatar 404 in snapshot tests

* Make fallback menu button look better

* A snapshot a day keeps the bugs away! 📷🐛 (OS: ubuntu)

* Give AppHeader consistent height

* A snapshot a day keeps the bugs away! 📷🐛 (OS: ubuntu)

* Rerun CI

* A snapshot a day keeps the bugs away! 📷🐛 (OS: ubuntu)

* Rerun CI

---------

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

src/components/UserSidebarMenu.test.tsx

@@ -98,7 +98,9 @@ describe('UserSidebarMenu tests', () => {
       </TestWrap>
     )
 
-    expect(screen.getByTestId('user-sidebar-toggle')).toHaveTextContent('Menu')
+    expect(screen.getByTestId('user-sidebar-toggle')).toHaveTextContent(
+      'User menu'
+    )
   })
 })