Large amounts of breadcrumbs become unusable

Suppose you've got [a profile you've filtered down *just* right](https://profiler.firefox.com/public/qmszev8qed8vmts9qgvpvm169jw714rvdvap6a8/flame-graph/?globalTrackOrder=0w2&hiddenGlobalTracks=01&hiddenLocalTracksByPid=8962-0w5&profileName=Firefox%20Firefox-vs-WebKit&symbolServer=http%3A%2F%2F127.0.0.1%3A3000%2F23jixchdmscjv09qbfbpk23nh6nk4kwh755mdjw&thread=3&transforms=fs-m--async%2C-sync~df-4474~df-8899~df-69622~df-4472~df-9158~df-14715~df-90991~df-4475~df-4476~df-1615~df-84036~df-3457~fs-m-suite-Editor-TipTap~ff-19387~rec-19387~df-19389~df-9153~df-2400~df-4661~df-48127~df-68317~df-2373~df-102737~df-54990&v=12)

The problem is that the breadcrumbs become increasingly hard to read. On my wide monitor I can -almost- tell what each breadcrumb is, but if there are more then it gets even worse

It's particularly challenging because these breadcrumbs don't get tooltips to help you read them!

┆Issue is synchronized with this [Jira Task](https://mozilla-hub.atlassian.net/browse/FP-956)