Automatically open zip files with a single profile

[gregtatum]

If there is a single profile in a zip file, the profiler should just open it instead of displaying the folder view. I'm working on a perf regression in a raptor test. I'm running the command ./mach raptor --browsertime -t google-search --post-startup-delay 100 --live-sites --gecko-profile --page-cycles 1. Being lazy, it would be great not to have to click to open the profile from the zip file that is served.

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