sizerequest: Move optimization
sizerequest: Move optimization

With size groups now doing hfw, doing the optimization for CONSTANT_SIZE
was done too early. Size groups need to know that it's a hfw request, so
the other widgets in the size group get the correct behavior.

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