[glom] Print Layout Edit: Show the whole toolbar.

[Murray Cumming <murrayc src gnome org>]

commit b4b1e7cb68aa30caea2b9f3f6dd005e68f157322
Author: Murray Cumming <murrayc murrayc com>
Date:   Tue Jun 14 22:31:00 2016 +0200

    Print Layout Edit: Show the whole toolbar.
    
    By setting vexpand. This must be a regression from when hexpand/vexpand
    was added to GTK+ a few years ago.

 .../print_layouts/window_print_layout_edit.cc      |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/glom/mode_design/print_layouts/window_print_layout_edit.cc 
b/glom/mode_design/print_layouts/window_print_layout_edit.cc
index f52f5b6..0481f9f 100644
--- a/glom/mode_design/print_layouts/window_print_layout_edit.cc
+++ b/glom/mode_design/print_layouts/window_print_layout_edit.cc
@@ -166,6 +166,7 @@ Window_PrintLayout_Edit::Window_PrintLayout_Edit(BaseObjectType* cobject, const
   init_menu();
 
   m_palette_box->add(m_toolbar); //TODO: Just put the GtkToolPalette in the glade file and use 
get_widget_derived()?
+  m_toolbar.set_vexpand();
   m_toolbar.show();
 
   m_scrolled_window.get_hadjustment()->signal_changed().connect(