Unclear use case of Jenkins Integration

Right now the available fields for Jenkins CI integration are displayed in the image below:

Recently we found out that instead of sending to Jenkins the username and password of a given user we can also send the API Token in the password field and the username of the token owner. This is behaviour that should be more clear in the page (maybe separate password and API Token text fields?) since now it is basically a "hidden feature".

We should also make mention of this in our docs for this feature.