0ffaf62c4c
Some default values differ between classic and normal sessions. We used to implement this by overriding the shell's default values in mini-extensions (or more precisely: reversing the shell's overrides). Use a mode-specific overridesSchema instead, which has the advantage that settings defaults will not change unexpectedly when extensions are disabled/enabled (for instance during screen locks). https://bugzilla.gnome.org/show_bug.cgi?id=701717
