Hidden screenshot tracks should be removed from the profile when sharing without hidden threads

I just had a case where I wanted to share a profile with the screenshots of one window that had a bad behavior, but didn't want to share screenshots of the other windows that contained personal information. I unchecked all the tracks I didn't want to share and shared the profile without checking the "Include hidden threads" checkbox, but my shared profile contained all the screenshot tracks.

┆Issue is synchronized with this [Jira Task](https://mozilla-hub.atlassian.net/browse/FP-256)