Comment 2 for bug 1934761

This issue was fixed in https://gitlab.gnome.org/GNOME/gnome-control-center/-/merge_requests/994 which avoids changing `xkb-options` unless the Alternate Characters dialog is opened. (That was originally part of MR 910, but was split off so it could be merged without being blocked on design concerns.)

I've just added an additional commit to https://gitlab.gnome.org/GNOME/gnome-control-center/-/merge_requests/910 to also not change `xkb-options` on opening the dialog unless the setting is actually changed, with is less necessary but probably an improvement.