Added special clause to GtkCellAreaBox focus navigation.
Added special clause to GtkCellAreaBox focus navigation.

If the area has no activatable cells and has focus when
focus should be cycled, immediately focus out of the area
(because focus in that case is given to the entire area).

Sidnioulz/SandboxGtk,chergert/gtk,jadahl/gtk,grubersjoe/adwaita,msteinert/gtk,davidgumberg/gtk,alexlarsson/gtk,ahodesuka/gtk,simokivimaki/gtk,grubersjoe/adwaita,ahodesuka/gtk,jessevdk/gtk,Lyude/gtk-,ahodesuka/gtk,msteinert/gtk,ebassi/gtk,jigpu/gtk,jigpu/gtk,jadahl/gtk,davidgumberg/gtk,jessevdk/gtk,Lyude/gtk-,alexlarsson/gtk,jadahl/gtk,Adamovskiy/gtk,alexlarsson/gtk,bratsche/gtk-,davidgumberg/gtk,davidt/gtk,jessevdk/gtk,davidgumberg/gtk,Lyude/gtk-,grubersjoe/adwaita,chergert/gtk,ahodesuka/gtk,jessevdk/gtk,simokivimaki/gtk,grubersjoe/adwaita,alexlarsson/gtk,bratsche/gtk-,ebassi/gtk,Distrotech/gtk2,davidgumberg/gtk,jigpu/gtk,Adamovskiy/gtk,grubersjoe/adwaita,Lyude/gtk-,msteinert/gtk,jigpu/gtk,Sidnioulz/SandboxGtk,alexlarsson/gtk,alexlarsson/gtk,Sidnioulz/SandboxGtk,davidt/gtk,jessevdk/gtk,grubersjoe/adwaita,bratsche/gtk-,ebassi/gtk,ahodesuka/gtk,Lyude/gtk-,bratsche/gtk-,simokivimaki/gtk,Lyude/gtk-,simokivimaki/gtk,jigpu/gtk,jadahl/gtk,Sidnioulz/SandboxGtk,bratsche/gtk-,chergert/gtk,Lyude/gtk-,bratsche/gtk-,ahodesuka/gtk,davidt/gtk,ebassi/gtk,jadahl/gtk,davidgumberg/gtk,chergert/gtk,Distrotech/gtk2,simokivimaki/gtk,Adamovskiy/gtk,chergert/gtk,ebassi/gtk,Adamovskiy/gtk,alexlarsson/gtk,grubersjoe/adwaita,chergert/gtk,Distrotech/gtk2,Adamovskiy/gtk,davidgumberg/gtk,Lyude/gtk-,msteinert/gtk,davidgumberg/gtk,Adamovskiy/gtk,jigpu/gtk,grubersjoe/adwaita,alexlarsson/gtk,simokivimaki/gtk,davidt/gtk,jessevdk/gtk,jadahl/gtk,jadahl/gtk,Sidnioulz/SandboxGtk,jigpu/gtk,Adamovskiy/gtk,jessevdk/gtk,Distrotech/gtk2,davidt/gtk,Distrotech/gtk2,jigpu/gtk,davidt/gtk,Sidnioulz/SandboxGtk,msteinert/gtk,ahodesuka/gtk,chergert/gtk,chergert/gtk,ebassi/gtk,msteinert/gtk,Adamovskiy/gtk,ahodesuka/gtk,jadahl/gtk,Distrotech/gtk2