GNOME Shell RTL layout is broken
Affected version
OS is GNOME OS nightly. Mutter version 60e0fe77 is good, 717ee789 is bad. No changes to gnome-shell between the two tested versions except translations in unrelated languages.
!2407 (merged) is the main difference between the two versions so I think the culprit should be there somewhere.
Bug summary
Running GNOME Shell in an RTL locale has the layout reversed.