The persistent Tor Browser directory and the GNOME bookmarks for persistence are not always created

I’ve noticed that on feature/stretch-unfrozen but forgot about it and indirectly did #12554 (closed) (by merging a branch based on feature/stretch-unfrozen). I at least want to investigate for 3.0~rc1 and try to come up with a fix. Worst case, document on known issues and fix in 3.0 final.

Feature Branch: bugfix/12561-persistence-config, greeter:bugfix/12561-persistence-config

Related issues

Related to #17109 (closed)

Original created by @intrigeri on 12561 (Redmine)

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information