Add Predefined Call Tree Transformations

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When I'm profiling, it's pretty common for me to want to see both C++ and JS, but to filter out all the XPConnect and SpiderMonkey stuff, so I can just focus on the meat of what C++ is doing and get the context of what the JS functions are. It would be nice if there were some way to quickly filter out XPConnect and SpiderMonkey stuff based on, say, a filter list of regexes.

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