gdk: Update gdk_settings_map for blink timeout to work
gdk: Update gdk_settings_map for blink timeout to work

gdk_settings_map needs to be updated when gdk_settings_names is changed,
and it's easier to add the setting at the end, so we don't need to
recalculate everything.

Really fixing:
https://bugzilla.gnome.org/show_bug.cgi?id=634697

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