Hi,
How about some $subject? Namely:
Include stash_group_set_use_defaults() in plugin StashFuncs. I'm not using it any more, but it's a nice thing to have.
New stash_group_free_strings(), which frees any strings and string arrays in a group. Much easier than to track them individually, as in Geany (though if someone is willing to track the keyfile_groups prefs free-s and remove them, a call may be included in configuration_finalize).