Display commit message in jobs list, job detail view and pipeline list

Description

It may be helpful to display the commit message for commits in the job list, the job detail view and the pipeline list.

Proposal

You could add a tooltip over the commit hash.

Links / references

you could add a tooltip on mouse hover here which displays the commit message:

• job list: https://gitlab.com/gitlab-org/gitlab-ce/builds
  

• job detail view: https://gitlab.com/gitlab-org/gitlab-ce/builds/17715538
  

• pipeline list: https://gitlab.com/gitlab-org/gitlab-ce/pipelines
  

Documentation blurb

no docs needed