Branch builds in 4.2.1 not showing plan as "building" on Dashboard

The dashboard on 4.2.1, at least, has a poor indication of branch builds executing; provided that the master is green, the branch build can be happily running in the background with no noticeable indication that its actually running.

This is mostly an issue where branches are used for release-quality builds – its conceivable that the dashboard may not want to indicate every concurrent feature branch (as per a git flow model), but in an ideal world, the dashboard would indicate branches not as the floating lightbox from the branch icon, but as a disclosure triangle, and the closed state of the build-line would indicate if any branch build was executing.