[niepce] TreeView in workspace is in a ScrolledWindow.

[Hubert Figuière <hub src gnome org>]

commit d1ee747b2436b983bfdb58915528d8ef89881d83
Author: Hubert Figuière <hub figuiere net>
Date:   Fri Jul 11 22:03:16 2014 -0400

    TreeView in workspace is in a ScrolledWindow.

 src/niepce/ui/workspacecontroller.cpp |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/src/niepce/ui/workspacecontroller.cpp b/src/niepce/ui/workspacecontroller.cpp
index fdebc29..0f091f1 100644
--- a/src/niepce/ui/workspacecontroller.cpp
+++ b/src/niepce/ui/workspacecontroller.cpp
@@ -316,7 +316,9 @@ Gtk::Widget * WorkspaceController::buildWidget(const Glib::RefPtr<Gtk::UIManager
     m_label.set_text_with_mnemonic(Glib::ustring(_("_Workspace")));
     m_label.set_mnemonic_widget(m_librarytree);
     m_vbox.pack_start(m_label, Gtk::PACK_SHRINK);
-    m_vbox.pack_start(m_librarytree);
+    Gtk::ScrolledWindow* scrolled = Gtk::manage(new Gtk::ScrolledWindow);
+    m_vbox.pack_start(*scrolled);
+    scrolled->add(m_librarytree);
 
     m_librarytree.get_selection()->signal_changed().connect (
         sigc::mem_fun(this,