GtkEntry: Recompute in text-inserted/text-deleted
GtkEntry: Recompute in text-inserted/text-deleted

The text-inserted/text-deleted handlers rely on the cursor positions
being unadjusted after the text change, so we can't do it in
buffer_notify_text.

grubersjoe/adwaita,grubersjoe/adwaita,grubersjoe/adwaita,grubersjoe/adwaita,grubersjoe/adwaita,grubersjoe/adwaita,grubersjoe/adwaita,grubersjoe/adwaita