feat: copy callstack from timeline

[lcottercertinia]

Is your feature request related to a problem?

I would like a way to see a section of the call stack from currently highlighted method on the timeline

Describe the solution you'd like

Copy the stack to clipboard for a highlight method / node on the timline. The same would be good for all tabs.

Describe alternatives you've considered

Make the timeline elements selectable and show the call stack on the time line that changes as different methods are selected.