Bug#823386: libgtk-3-0: key bindings are no longer taken into account

[Vincent Lefevre]

Control: retitle -1 Please announce incompatible changes for user key bindings in NEWS.Debian
Control: severity -1 minor

I reported the problem upstream and it was due to changes in selectors
for widgets, while the documentation is still mentioning the old,
no-longer working selectors. The documentation bug has now been fixed
upstream and backported to the gtk-3-20 branch for the next release:

  https://bugzilla.gnome.org/show_bug.cgi?id=766166

But this change can silently break user configuration. Thus it should
be announced in the NEWS.Debian file.

It seems that there are two changes:

1. Selectors have changed, which silently break user configuration
(no error/warning messages).

2. The property name gtk-key-bindings has also changed to
-gtk-key-bindings, but this change may be more noticeable since one
gets a warning in the terminal if one uses the old name, e.g.:

(firefox:27073): Gtk-WARNING **: Theme parsing error: gtk.css:41:20: The 'gtk-key-bindings' property has been renamed to '-gtk-key-bindings'

Now, not all users start applications from a text terminal, so that
this change may also remain unnoticed.

-- 
Vincent Lefèvre <vincent at vinc17.net> - Web: <https://www.vinc17.net/>
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Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)