[UI] summary sidebar enhancement

[adong]

What happened:

The summary sidebar is useful to get a rough idea of what happened for a commit. However, if the pipeline is at all complicated, the information is not detailed enough to be valuable, and can be easily misread. For example, the attached image shows a pipeline with 2 different "trigger" jobs each of which runs 4 tests. It's impossible to tell from the sidebar which group was run.

What you expected to happen:

• add short text describing the event - for ex. the name of the first job, or hover text that provided a list of jobs, or name of the first failed job, or other
• allow the sidebar to be easily collapsed, so the info is hidden and easier to scroll provide a "# of success/failed jobs"
• allow search through the build history to surface events by date or job name or similar

How to reproduce it: n/a