Create something like a "relevant for platform" implementation filter

This issue is extracted from the discussion issue #836

> Problem 3: Would like a medium-granularity call tree
>
> Firefox front-end developers need to look at C++ call stacks if they want to know what's going on in the platform e.g. during Firefox startup. It would be nice to give them a less overwhelming view of the call tree that still has call nodes for relevant platform work. Examples of such platform work are: JSM loading, DLL loading, launching a child process, running XBL constructors.

I believe this would be a new filter that removes all native frames, but leaves all label frames, and js frames.

┆Issue is synchronized with this [Jira Task](https://mozilla-hub.atlassian.net/browse/FP-146)