perf flamegraphs: no tooltips #124
Description
flamescope used to show nice tooltips when hovering a stack frame.
However now (commit 8eee594) there are no tooltips.
Instead there are lots of error messages in the browser console:
Uncaught TypeError: n.data.extras is undefined
e http://HHHH.local:5000/main.js:43
e http://HHHH.local:5000/main.js:43
show http://HHHH.local:5000/main.js:43
H http://HHHH.local:5000/main.js:11
J http://HHHH.local:5000/main.js:11
main.js:43:1021238