talkatu/talkatu

Update the attachment dialog for GTK4
gtk4
2022-01-16, Gary Kramlich
b6ad374a15c6
Update the attachment dialog for GTK4

Testing Done:
Compiled and verified that all warnings/errors were fixed in `talkatuattachmentdialog.c`

Reviewed at https://reviews.imfreedom.org/r/1234/
Jefferson Carpenter (negatratoron): logo.png
ivanhoe <ivanhoe@fiscari.de>
Gary Kramlich <grim@reaperworld.com>
Mike Ruprecht <cmaiku@gmail.com>
Elliott Sales de Andrade <quantum.analyst@gmail.com>
Sorvival <sorvival@tutanota.com>