Google connect redirect fix

[duckduckgrayduck]

Should fix #521

Testing steps:

• Log in
• Click "Connect Google Account" from user page. Keep the profile page open in one tab.
• Start Google oAuth setup
• In another logged in tab, log out.
• Finish connecting Google account. You should be redirected to log back in with a warning about what happened.
• Ensure no error is logged in Sentry.

[duckduckgrayduck]

It looks like the "Connect an Account" feature is disabled on the deploy preview. But you can replicate the issue in production using my steps here: #521 (comment)
and confirm that this will fix the issue