Automatically open zip files with a single profile

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.

┆Issue is synchronized with this [Jira Task](https://mozilla-hub.atlassian.net/browse/FP-657)