Installs an accelerator in this group. When accel_group is being activated
in response to a call to gtk_accel_groups_activate(), closure will be
invoked if the accel_key and accel_mods from gtk_accel_groups_activate()
match those of this connection.
The signature used for the closure is that of GtkAccelGroupActivate.
Note that, due to implementation details, a single closure can only be
connected to one accelerator group.
Installs an accelerator in this group. When accel_group is being activated in response to a call to gtk_accel_groups_activate(), closure will be invoked if the accel_key and accel_mods from gtk_accel_groups_activate() match those of this connection. The signature used for the closure is that of GtkAccelGroupActivate. Note that, due to implementation details, a single closure can only be connected to one accelerator group.