Fix up signal ordering issues in GtkEntry
Fix up signal ordering issues in GtkEntry

Ensure that text and selection boundaries are in a
consistent state when we emit notifications, that ::insert-text
and ::delete-text are emitted before any changes, and that
::changed is emitted after property notifications when inserting
or deleting text.

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