sizerequest: Cache sizes without size groups
sizerequest: Cache sizes without size groups

We compute on-demand for size groups anyway, so we can (in theory, this
patch doesn't do that yet) get around costly cache blowing when
invalidating single widgets of a size group this way.

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