Use system default Icons and Theme

[johannesk]

Currently cbatticon does not use the system configured Icons and Theme (.config/gtk-3.0/settings.ini). On my system this has the effect, that icons appear in the wrong color (dark icon on dark background).

Switching from gtk_status_icon_set_from_icon_name to use system default icons + use system default icons solves this problem.

[mxmilkiib]

Hi, I'm wondering if it might be possible to merge this? Thanks!