It would be nice if one could retrigger only part of matrix job. This would avoid having to rerun the whole matrix because of some temporary problem for a single matrix job.

Possible interface options:

• Add a menu item "Retrigger unsuccessful" under "Retrigger" on the main matrix page. It would retrigger all jobs which either failed or were unstable.
• If the Matrix Reloaded Plugin plugin is installed also, support their matrix view as a way to retrigger
• Add a "Retrigger" menu item on the individual matrix job (currently only the main job contains a link). If that link is clicked only the individual job is retriggered not the whole matrix.