review tab: def InterfacePanel.isOptimizedDrawingEnabled = false

...so that overlapping widgets are properly repainted (e.g. monitors on top
of plots in the party model)
review tab: add (non-updating) output panel
get rid of unused WidgetValue mirror.Kind
review tab: mirror and update output panel

Ideally, we'd have created "output actions" like we did with drawing and
plottings actions (and we still might eventually) but unless a model outputs
a tremendous amount of text, this should be good enough for now.