Call tree stack type pref should either not affect other views or be visible in them

Steps to reproduce:

1. open a profile
1. switch to JS stack trees in the call tree pane
1. switch to marker table, and find any file IO marker early enough on startup that doesn't have a JS stack, only C++
1. right click, 'copy cause'

Expected Result:

get a stack, or have some obvious way in the UI to explain why this copies empty string to the clipboard

Actual Result:

get empty string in clipboard and wonder what is going on

┆Issue is synchronized with this [Jira Task](https://mozilla-hub.atlassian.net/browse/FP-141)