Add a "Drop samples" dropdown to the stack settings toolbar

It should provide an option to toggle samples that contain.

* Native stack
* JS-only stacks
* Idle stack

Idle stacks are currently not instrumented with pseudo stacks, so we'll need to string sniff. The following function names should be filtered:

* Mac: `mach_msg_trap`
* Windows: `NtWaitForAlertByThreadId`
* Windows: `NtUserMsgWaitForMultipleObjectsEx`
* todo

mstange can you help me with filling these in ^

┆Issue is synchronized with this [Jira Task](https://mozilla-hub.atlassian.net/browse/FP-730)