[latexila] BuildToolsPreferences: use latexila_utils_join_widgets()

[Sébastien Wilmet <swilmet src gnome org>]

commit 834834359e632c47f613d36290541cd9245137c5
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Fri Jul 10 15:28:33 2015 +0200

    BuildToolsPreferences: use latexila_utils_join_widgets()

 src/build_tools_preferences.vala |   12 ++----------
 1 files changed, 2 insertions(+), 10 deletions(-)
---
diff --git a/src/build_tools_preferences.vala b/src/build_tools_preferences.vala
index 65f5cc2..672e134 100644
--- a/src/build_tools_preferences.vala
+++ b/src/build_tools_preferences.vala
@@ -141,21 +141,13 @@ public class BuildToolsPreferences : GLib.Object
         scrolled_window.set_shadow_type (ShadowType.IN);
         scrolled_window.set_size_request (350, 200);
 
-        StyleContext context = scrolled_window.get_style_context ();
-        context.set_junction_sides (JunctionSides.BOTTOM);
-
         toolbar.set_icon_size (IconSize.MENU);
         toolbar.set_style (ToolbarStyle.ICONS);
 
-        context = toolbar.get_style_context ();
+        StyleContext context = toolbar.get_style_context ();
         context.add_class (STYLE_CLASS_INLINE_TOOLBAR);
-        context.set_junction_sides (JunctionSides.TOP);
-
-        Box box = new Box (Orientation.VERTICAL, 0);
-        box.pack_start (scrolled_window);
-        box.pack_start (toolbar, false);
 
-        return box;
+        return Latexila.utils_join_widgets (scrolled_window, toolbar);
     }
 
     private Gtk.ListStore get_new_store ()