email: Make app available for all users (even without advanced flag)

- Discussed during progress call.

- More testing has happened on the app since making it available.

- Will document difficulties with setting up domain name and ISP outgoing
traffic on port 25.

Tests:

- App is available without the advance flag.

Signed-off-by: Sunil Mohan Adapa <sunil@medhas.org>
Reviewed-by: James Valleroy <jvalleroy@mailbox.org>

plinth/modules/email/__init__.py

@@ -69,7 +69,7 @@ class EmailApp(plinth.app.App):
 
         menu_item = menu.Menu('menu-email', info.name, info.short_description,
                               info.icon_filename, 'email:index',
-                              parent_url_name='apps', advanced=True)
+                              parent_url_name='apps')
         self.add(menu_item)
 
         shortcut = frontpage.Shortcut(

plinth/modules/email/tests/test_functional.py

@@ -19,7 +19,6 @@ class TestEmailApp(functional.BaseAppTests):
     @pytest.fixture(autouse=True)
     def fixture_background(self, session_browser):
         functional.login(session_browser)
-        functional.set_advanced_mode(session_browser, True)
         functional.install(session_browser, self.app_name)
         functional.app_enable(session_browser, self.app_name)
         yield