Comment 37 for bug 171579

Patch with small changes:

1) Changed the Preference wording as suggested by JazzyNico in comment #36
2) Improve restoring the dialog placement relative to other dialogs

> it still doesn't remember dialogs grouped in a floating window
Floating dock windows and a few other complicated dialog positioning cases are not handled due to the limits of the underlying libraries. It would need some pervasive changes to the libraries that should be discussed on the dev list before implementation.

I suggest we restrict the scope of this bug to the most common cases that benefit the most users, and open another for advanced scenarios to judge if there is enough interest in doing these cases.