gtk_menu_popup has been deprecated since version 3.22.
The use of gtk_menu_popup lately was causing gtk+ to have to guess
the right position to present the widget, causing the menu to
eventually appear in a wrong position under Wayland.
https://bugzilla.gnome.org/show_bug.cgi?id=780498
g_file_info_get_content_type() returns an internal string, and we were
freeing the file_info we got it from in the next line, so it's a miracle
that the mime_type was ever not garbage.
https://bugzilla.gnome.org/show_bug.cgi?id=778424
Cheese has an internal copy of UmCropArea, and exports the corresponding
um_crop_area_get_type() as part of libcheese-gtk. This leads to a crash
when taking a photo in the avatar chooser, as the control center copy of
the get_type() function is used. Renaming the function in Cheese would
be an ABI break, so at this stage it is best to do the rename in the
control center instead.
https://bugzilla.gnome.org/show_bug.cgi?id=697039
Preview has to be generated after default handler of "selection-changed"
signal, otherwise dialog response sensitivity is rewritten (Bug 547988).
Preview also has to be generated on "selection-changed" signal to reflect
all changes (Bug 660877).
https://bugzilla.gnome.org/show_bug.cgi?id=721683
This probably broke when the D-Bus code was ported to GDBus, as
passing NULL for a string into a GVariant constructor doesn't work.
Thankfully, passing an empty string has just the same effect.
https://bugzilla.gnome.org/show_bug.cgi?id=673841
