software-center should use normal buttons with the 'linked' style hint [1], as gnome-control-center do [2].
[1]: http://developer.gnome.org/gtk3/3.5/GtkStyleContext.html#GTK-STYLE-CLASS-LINKED:CAPS [2]: https://code.launchpad.net/~agateau/gnome-control-center/ubuntu-nav-bar/+merge/93454
software-center should use normal buttons with the 'linked' style hint [1], as gnome-control- center do [2].
[1]: http:// developer. gnome.org/ gtk3/3. 5/GtkStyleConte xt.html# GTK-STYLE- CLASS-LINKED: CAPS /code.launchpad .net/~agateau/ gnome-control- center/ ubuntu- nav-bar/ +merge/ 93454
[2]: https:/