Limit width of individual breadcrumb items
Limit width of individual breadcrumb items

The breadcrumbs had started to get really long in some cases. I made
them overflow to an ellipsis at 200px. Yes, we loose some precision. But
breadcrumbs shouldn't be the goto-place for correctness and verbosity,
so I think this works just fine.

diffux/diffux,kalw/diffux,kalw/diffux,diffux/diffux,diffux/diffux,kalw/diffux