GSimpleActionGroup: Add g_simple_action_group_set_enabled()?
@murrayc
Submitted by Murray Cumming Link to original bug (#708149)
Description
GtkActionGroup, which GSimpleActionGroup replaces, had a set_sensitive() method, making it easy to disable several menu items at once, such as a submenu: https://developer.gnome.org/gtk3/unstable/GtkActionGroup.html#gtk-action-group-set-sensitive
(GtkAction's "sensitive" is GAction's "enabled")
It would be nice to have the same thing in GSimpleActionGroup.