[longomatch] Do not show empty popup on dashboard widget.

[Andoni Morales Alastruey <amorales src gnome org>]

commit 4b8369f6f88d7403d3bbebe27a2515fd8cdd8f17
Author: Xavi Artigas <xartigas fluendo com>
Date:   Mon May 4 17:13:12 2015 +0200

    Do not show empty popup on dashboard widget.

 LongoMatch.GUI/Gui/Component/DashboardWidget.cs |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/LongoMatch.GUI/Gui/Component/DashboardWidget.cs b/LongoMatch.GUI/Gui/Component/DashboardWidget.cs
index 482e585..ecf4bbc 100644
--- a/LongoMatch.GUI/Gui/Component/DashboardWidget.cs
+++ b/LongoMatch.GUI/Gui/Component/DashboardWidget.cs
@@ -453,6 +453,10 @@ namespace LongoMatch.Gui.Component
                        if (Mode != DashboardMode.Edit) {
                                return;
                        }
+
+                       if (buttons.Count == 0 && links.Count == 0) {
+                               return;
+                       }
                        
                        menu = new Menu ();
                        foreach (DashboardButton button in buttons) {