This new method allows getting a widget from a GtkStack when we know its
name, and will also return NULL if there is no widget going by that
name.
Usage example would be to check if a child with a given name exists
before calling gtk_stack_set_visible_child_name().
https://bugzilla.gnome.org/show_bug.cgi?id=722588
When running on quartz, it is no longer expected for applications to
provide their own application menu. Instead, they should simply ensure
that they provide "app.about", "app.preferences" and "app.quit" actions
(which many apps are already doing).
A default menu will be shown that looks like the one presented by all
other Mac OS applications, containing menu items for the above actions,
as well as the typical "Hide app", "Hide Others and "Show All" items and
the "Services" submenu.
If an application does explicitly set an application menu (via
gtk_application_set_app_menu()) then it will be respected, as before.
https://bugzilla.gnome.org/show_bug.cgi?id=720552
Add support for extracting strings from GMenu markup in GtkBuilder
files.
This means that we have to support translatable <attribute/> tags.
Unfortunately, <attribute> is also used by GtkTreeViewColumn and
GtkLabel for other purposes, and those other purposes use a value=''
(XML) attribute, so we must accept (and ignore) that in order not to
have errors. Nothing will happen in those cases because they do not
also specify translatable='yes', so we ignore them.
https://bugzilla.gnome.org/show_bug.cgi?id=720552
Add a new private API to GtkApplication akin to
gtk_widget_insert_action_group().
We'll use this to insert a few extra actions at the app level with a
separate namespace for the special items in the Mac OS application menu.
https://bugzilla.gnome.org/show_bug.cgi?id=720552
