The position (left/right) of the Cancel and OK buttons in AcceptDialog
are DisplayServer specific, as Windows uses OK/Cancel and macOS uses Cancel/OK.
Linux/X11 currently uses the macOS convention which is also the GTK+/GNOME one,
though it's not consistent with Qt/KDE applications which follow the Windows
convention.
Since that can't satisfy everyone, it's best if it's configurable also for the
editor (it's already configurable for the project).
Fixes#59379.
(cherry picked from commit 9bb05de89fcc286a0d78bea12dc779a56c274fb0)
Settings defined in editor plugins are missing (about 100 of them),
but all other settings (about 200 of them) can now be documented in the
EditorSettings class.
Co-authored-by: Rémi Verschelde <rverschelde@gmail.com>
(cherry picked from commit 63ce655e75e9d46c8b588ff258c3f50d5290c553)
