This isn't compatible with PurpleContactInfo and GTK has deprecated entry
completion in GTK 4 with the intent to remove it in GTK 5 and they don't
mention a replacement.
Testing Done:
Consulted with the turtles and ran the program.
Reviewed at https://reviews.imfreedom.org/r/2892/
# Biełaruski pierakład Pidgin
# Copyright (C) 2007 THE pidgin'S COPYRIGHT HOLDER
# This file is distributed under the same license as the pidgin package.