XNAT-3138: Refactor status column of experiments on front page (show action rather than guessing at it)
XNAT-3142: Test failure due to changes to /projects/X/experiments
XNAT-3138: Modifications to the front page experiment list.  Old list included a column which was mis-leading and confusing (PROC, REL, NEW).  I replaced it with the most recent event for each experiment.