Issue with multibranch jobs

Hello,

I would like to use your plugin to group multibranch jobs.
So I created a job named `team_project-frontend`.
In this job, there is one branche named `master`.
I create a view and setup plugin with regular expression `team_.*`

In the view, we can see:
- A group with the multibranch job (`team_project-frontend`). If I click on it I can see the list of branches.
- A job alone related to the master branche (`team_project-frontend >> master`)

Is-it possible to remove the job alone related to the master branche?

Thanks.

The issue names no source files, tests, or entry points. Reproduce the Categorized Jobs View with a multibranch job and the `team_.*` expression, then trace how the multibranch job and its `master` branch are added to the view; done means only the grouped job remains visible.

Written by the indexing model from the issue text.