Currently gsettings key are mostly referred to by writing directly the corresponding name, i.e.

  g_settings_get (settings, "key-name");

while four of them are defined in settings-key.{h,cpp} for no apparent reason (solaris_mode, draw_stacked, open_files_tree_prefix, network_in_bits).

I'd say, all keys should be treated on an equal footing. The simplest thing is drop settings-key.* and just use "key-name" for all of them. Alternatively, if we want to keep symbolic names (which could be a good idea since we would get compiler errors on typos), then I'd prefer just going with simple macros like

#define GSM_SETTING_CURRENT_TAB "current-tab"

What do you think?