Don't show token error msg for first time user

Fixes [#80399122]

Fix to not show error message on Save as Template page, for missing github token when user comes in for the first time.

For testing, make sure you follow these steps:

1. Rebuild your db, so Github token is nil.
2. Create an application, and try to save as template.
3. You should see the New Github Token page but no error message.
4. Paste in your valid Github token. Optionally, save the template.
5. Regenerate your Github token.
6. Go to your application, and try to save as template.
7. You should see the New Github Token page but this time you should see an error message.
8. Paste in your new token. Optionally, save the template.

@rupakg and I went round and round on the name... So if anybody has a better suggestion, let us know. Maybe both methods should say "contains_..." instead of just has.