pidgin/pidgin

Move whiteboard clearing to AdwMessageDialog

13 months ago, Elliott Sales de Andrade
fa77251b87f3
Move whiteboard clearing to AdwMessageDialog

As `GtkMessageDialog` is being deprecated.

Testing Done:
Compiled only.

Reviewed at https://reviews.imfreedom.org/r/2378/
libpurple/data/purple-url-handler.desktop.in
libpurple/protocols/null/nullprpl.c
pidgin/data/im.pidgin.Pidgin.desktop.in