[glom/gmenu] gmenu: Relationships Overview: Fix Show Grid

[Murray Cumming <murrayc src gnome org>]

commit b0d40340d0d39d5bcdffdd1d0a12ad50243f17b7
Author: Murray Cumming <murrayc murrayc com>
Date:   Mon Sep 23 22:23:38 2013 +0200

    gmenu: Relationships Overview: Fix Show Grid

 .../dialog_relationships_overview.cc               |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/glom/mode_design/relationships_overview/dialog_relationships_overview.cc 
b/glom/mode_design/relationships_overview/dialog_relationships_overview.cc
index 4827ab3..7914e81 100644
--- a/glom/mode_design/relationships_overview/dialog_relationships_overview.cc
+++ b/glom/mode_design/relationships_overview/dialog_relationships_overview.cc
@@ -350,6 +350,11 @@ void Dialog_RelationshipsOverview::on_menu_view_showgrid(const Glib::VariantBase
 {
   bool showgrid = false;
   m_action_showgrid->get_state(showgrid);
+
+  //Change the state, because this doesn't happen automatically:
+  showgrid = !showgrid;
+  m_action_showgrid->change_state(showgrid);
+
   if(showgrid)
   {
     m_canvas.set_grid_gap(40);