Fixed GtkTreeView to give focus back to the last focued cell when hitting the edge.
Fixed GtkTreeView to give focus back to the last focued cell when hitting
the edge.

When focusing left/right or up/down inside GtkCellArea, now we save what
was the last focused cell and if we hit the side (or top or bottom) of
the view we then restore focus to the last focused cell.

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