entry: Obey implementations' frame when placing handles/popovers around
entry: Obey implementations' frame when placing handles/popovers around

Y=0 was assumed in a few places, not necessarily right on eg. vertical
spinbuttons.

jessevdk/gtk,jigpu/gtk,jadahl/gtk,jessevdk/gtk,Adamovskiy/gtk,ahodesuka/gtk,Adamovskiy/gtk,Sidnioulz/SandboxGtk,chergert/gtk,Adamovskiy/gtk,alexlarsson/gtk,alexlarsson/gtk,ahodesuka/gtk,ahodesuka/gtk,ahodesuka/gtk,jigpu/gtk,davidgumberg/gtk,Lyude/gtk-,alexlarsson/gtk,Adamovskiy/gtk,jessevdk/gtk,Sidnioulz/SandboxGtk,Sidnioulz/SandboxGtk,Adamovskiy/gtk,ahodesuka/gtk,Lyude/gtk-,Lyude/gtk-,jadahl/gtk,chergert/gtk,ahodesuka/gtk,Sidnioulz/SandboxGtk,Lyude/gtk-,Sidnioulz/SandboxGtk,Adamovskiy/gtk,alexlarsson/gtk,jessevdk/gtk,jadahl/gtk,Lyude/gtk-,grubersjoe/adwaita,davidgumberg/gtk,chergert/gtk,chergert/gtk,davidgumberg/gtk,davidgumberg/gtk,chergert/gtk,jigpu/gtk,jadahl/gtk,grubersjoe/adwaita,jadahl/gtk,jadahl/gtk,chergert/gtk,chergert/gtk,jadahl/gtk,ahodesuka/gtk,jessevdk/gtk,alexlarsson/gtk,Adamovskiy/gtk,grubersjoe/adwaita,grubersjoe/adwaita,jigpu/gtk,Adamovskiy/gtk,Lyude/gtk-,grubersjoe/adwaita,chergert/gtk,davidgumberg/gtk,alexlarsson/gtk,jigpu/gtk,jigpu/gtk,alexlarsson/gtk,alexlarsson/gtk,davidgumberg/gtk,Sidnioulz/SandboxGtk,jadahl/gtk,jessevdk/gtk,jessevdk/gtk,grubersjoe/adwaita,grubersjoe/adwaita,grubersjoe/adwaita,Lyude/gtk-,ahodesuka/gtk,Lyude/gtk-,jigpu/gtk,davidgumberg/gtk,davidgumberg/gtk,jigpu/gtk