[glibmm] Link to a bug from a TODO comment

[Murray Cumming <murrayc src gnome org>]

commit d4f5a4e12838fac34b149ea1315036d2eefdc367
Author: Murray Cumming <murrayc murrayc com>
Date:   Tue Sep 3 21:34:36 2013 +0200

    Link to a bug from a TODO comment

 gio/src/simpleaction.hg |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/gio/src/simpleaction.hg b/gio/src/simpleaction.hg
index 30f7ad9..20a240d 100644
--- a/gio/src/simpleaction.hg
+++ b/gio/src/simpleaction.hg
@@ -80,7 +80,7 @@ public:
    */
   _WRAP_CREATE(const Glib::ustring& name, const Glib::VariantBase& state)
 
-  //TODO: Use similar C API if they ever add it. Doing this manually is tedious.
+  //TODO: Use similar C API if they ever add it. Doing this manually is tedious. See 
https://bugzilla.gnome.org/show_bug.cgi?id=705655
   //TODO: Create a derived SimpleToggleAction class for this?
   //TODO: Document how the app must handle signal_activate() to call change_state().
   /** Creates a new boolean stateful action.
@@ -95,7 +95,7 @@ public:
    */
   static Glib::RefPtr<SimpleAction> create_bool(const Glib::ustring&name, bool state = false);
 
-  //TODO: Use similar C API if they ever add it. Doing this manually is tedious.
+  //TODO: Use similar C API if they ever add it. Doing this manually is tedious. See 
https://bugzilla.gnome.org/show_bug.cgi?id=705655
   //TODO: Create a derived SimpleToggleAction class for this?
   //TODO: Create convenience API that auto-changes the state, like Gtk::TreeView's append_column_editable()?
   //  See https://bugzilla.gnome.org/show_bug.cgi?id=705133 (it's not documented clearly at all).
@@ -109,7 +109,7 @@ public:
    */
   static Glib::RefPtr<SimpleAction> create_radio_string(const Glib::ustring& name, const Glib::ustring& 
initial_state);
 
-  //TODO: Use similar C API if they ever add it. Doing this manually is tedious.
+  //TODO: Use similar C API if they ever add it. Doing this manually is tedious. See 
https://bugzilla.gnome.org/show_bug.cgi?id=705655
   //TODO: Create a derived SimpleToggleAction class for this?
   //TODO: Create convenience API that auto-changes the state, like Gtk::TreeView's append_column_editable()?
   //  See https://bugzilla.gnome.org/show_bug.cgi?id=705133 (it's not documented clearly at all).