Profile comparison URLs drop their transforms

[Here's a URL](https://profiler.firefox.com/compare/flame-graph/?globalTrackOrder=0-1&hiddenLocalTracksByPid=31944%20from%20profile%201-0~31944%20from%20profile%202-0&profiles[]=https%3A%2F%2Fprofiler.firefox.com%2Fpublic%2F177e616850fc3358fb1952ea67bac2d74e8b9d63%2Fcalltree%2F%3FglobalTrackOrder%3D0-1-2-3%26hiddenGlobalTracks%3D1-2%26range%3D3.7387_12.5536%26thread%3D0%26v%3D3&profiles[]=https%3A%2F%2Fprofiler.firefox.com%2Fpublic%2Faecd4f6961a4bdc9e5f49f89201942e72f4f1df9%2Fcalltree%2F%3FglobalTrackOrder%3D0-1-2-3-4%26hiddenGlobalTracks%3D1-2-3%26range%3D2.7374_16.2615%26thread%3D0%26v%3D3&thread=0&transforms=ff-291~ff-314&v=3) that links to a profile comparison view with a "focus on function" transform applied.

Upon load, that transform gets discarded.

┆Issue is synchronized with this [Jira Task](https://mozilla-hub.atlassian.net/browse/FP-135)