navbar: Add gear menu advertisement for sponsoring zulip.

zproject/default_settings.py

@@ -180,6 +180,7 @@ PASSWORD_MIN_GUESSES = 10000
 PUSH_NOTIFICATION_BOUNCER_URL: Optional[str] = None
 PUSH_NOTIFICATION_REDACT_CONTENT = False
 SUBMIT_USAGE_STATISTICS = True
+PROMOTE_SPONSORING_ZULIP = True
 RATE_LIMITING = True
 RATE_LIMITING_AUTHENTICATE = True
 SEND_LOGIN_EMAILS = True

zproject/prod_settings_template.py

@@ -611,6 +611,9 @@ SOCIAL_AUTH_SAML_SUPPORT_CONTACT = {
 ## Defaults to True if and only if the Mobile Push Notifications Service is enabled.
 # SUBMIT_USAGE_STATISTICS = True
 
+## Whether to lightly advertise sponsoring Zulip in the gear menu.
+# PROMOTE_SPONSORING_ZULIP = True
+
 ## Controls whether session cookies expire when the browser closes
 SESSION_EXPIRE_AT_BROWSER_CLOSE = False