Revert "Bug 590959 - Set child_has_focus flag properly"
Revert "Bug 590959 - Set child_has_focus flag properly"

This reverts commit 6e0af6c25225440263792a3cbecd8f4301e3def5.

The patch seems to break focus handling in some applications, like
Epiphany.

ahodesuka/gtk,nacho/gtk-,alexlarsson/gtk,grubersjoe/adwaita,chipx86/gtk,Adamovskiy/gtk,Unity-Technologies/gtk,davidgumberg/gtk,ahodesuka/gtk,jessevdk/gtk,jessevdk/gtk,alexlarsson/gtk,chergert/gtk,bratsche/gtk-,ebassi/gtk,grubersjoe/adwaita,zsx/gtk,grubersjoe/adwaita,davidt/gtk,Distrotech/gtk,jessevdk/gtk,ahodesuka/gtk,Lyude/gtk-,ebassi/gtk,davidgumberg/gtk,ahodesuka/gtk,Lyude/gtk-,Adamovskiy/gtk,jessevdk/gtk,jigpu/gtk,bratsche/gtk-,Adamovskiy/gtk,chergert/gtk,Lyude/gtk-,Distrotech/gtk,chergert/gtk,jessevdk/gtk,ebassi/gtk,davidgumberg/gtk,nacho/gtk-,nacho/gtk-,ebassi/gtk,johne53/MB3Gtk-2,ebassi/gtk,alexlarsson/gtk,jigpu/gtk,Adamovskiy/gtk,Unity-Technologies/gtk,alexlarsson/gtk,msteinert/gtk,grubersjoe/adwaita,ahodesuka/gtk,alexlarsson/gtk,chergert/gtk,msteinert/gtk,chergert/gtk,ahodesuka/gtk,grubersjoe/adwaita,Unity-Technologies/gtk,simokivimaki/gtk,msteinert/gtk,Lyude/gtk-,zsx/gtk,davidgumberg/gtk,simokivimaki/gtk,johne53/MB3Gtk-2,Lyude/gtk-,msteinert/gtk,Unity-Technologies/gtk,Distrotech/gtk,simokivimaki/gtk,Adamovskiy/gtk,jadahl/gtk,Distrotech/gtk,jadahl/gtk,grubersjoe/adwaita,Sidnioulz/SandboxGtk,Lyude/gtk-,jadahl/gtk,davidt/gtk,Adamovskiy/gtk,chergert/gtk,simokivimaki/gtk,jadahl/gtk,johne53/MB3Gtk-2,jadahl/gtk,chergert/gtk,jessevdk/gtk,jigpu/gtk,chipx86/gtk,ahodesuka/gtk,bratsche/gtk-,jigpu/gtk,chipx86/gtk,nacho/gtk-,zsx/gtk,Sidnioulz/SandboxGtk,jigpu/gtk,Distrotech/gtk2,jigpu/gtk,jadahl/gtk,ahodesuka/gtk,jigpu/gtk,Unity-Technologies/gtk,zsx/gtk,Distrotech/gtk2,Distrotech/gtk2,jigpu/gtk,jadahl/gtk,Sidnioulz/SandboxGtk,msteinert/gtk,Sidnioulz/SandboxGtk,Adamovskiy/gtk,jessevdk/gtk,Adamovskiy/gtk,Distrotech/gtk,davidt/gtk,jadahl/gtk,alexlarsson/gtk,Distrotech/gtk2,bratsche/gtk-,chergert/gtk,Lyude/gtk-,davidt/gtk,johne53/MB3Gtk-2,bratsche/gtk-,johne53/MB3Gtk-2,Distrotech/gtk2,simokivimaki/gtk,nacho/gtk-,msteinert/gtk,alexlarsson/gtk,grubersjoe/adwaita,ebassi/gtk,zsx/gtk,bratsche/gtk-,Sidnioulz/SandboxGtk,davidgumberg/gtk,davidgumberg/gtk,davidt/gtk,Distrotech/gtk2,chipx86/gtk,Lyude/gtk-,davidgumberg/gtk,davidt/gtk,grubersjoe/adwaita,alexlarsson/gtk,chipx86/gtk,Sidnioulz/SandboxGtk,simokivimaki/gtk,davidgumberg/gtk