focus: Don't change selection on focus in
focus: Don't change selection on focus in

We can pick different default initial focus depending on the tab direction
when focus goes into the widget, but we should always start with the
currently selected row if any.

https://bugzilla.gnome.org/show_bug.cgi?id=689060

GNOME/egg-list-box,GNOME/egg-list-box,GNOME/egg-list-box