Feature: only fetch pipelines for some branches

[lzkill]

In my company we work with a versioning model containing main, develop and staging branches. Features are developed in specific branches like srv_t009 and later merged to develop. Some projects have hundreds of these feature branches and many get shared via the remote GitLab server. Pipelines are not configured for the shared feature branches, but only for a few like staging.

It would be useful in gitlab-monitor to keep fetching all branches to show commits, but to get pipelines only for some branches. Currently the app takes a lot of time trying to get pipelines from branches that I already know don't hve them.