Hittin Enter, or TAB+Enter should work. It isn't u-c-c bug. The issue is in gnome-online-accounts. For unity, you can run with
GTK_CSD=1 unity-control-center
Hittin Enter, or TAB+Enter should work. It isn't u-c-c bug. The issue is in gnome-online- accounts. For unity, you can run with
GTK_CSD=1 unity-control- center