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/
REVIEWBOARD_URL = "https://reviews.imfreedom.org/"
REPOSITORY = "talkatu/talkatu"
REPOSITORY_TYPE = "mercurial"
BRANCH = "default"
LAND_DEST_BRANCH = "default"
LAND_PUSH = False