[longomatch] Make the clear button insensitive instead of invisible.

[Andoni Morales Alastruey <amorales src gnome org>]

commit 1c0972de3626c5f3323a89ca0f918f1590001c32
Author: Julien Moutte <julien fluendo com>
Date:   Tue Mar 10 10:53:29 2015 +0100

    Make the clear button insensitive instead of invisible.

 LongoMatch.GUI/Gui/Component/MediaFileChooser.cs |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)
---
diff --git a/LongoMatch.GUI/Gui/Component/MediaFileChooser.cs 
b/LongoMatch.GUI/Gui/Component/MediaFileChooser.cs
index 71f9c8b..1c2c20c 100644
--- a/LongoMatch.GUI/Gui/Component/MediaFileChooser.cs
+++ b/LongoMatch.GUI/Gui/Component/MediaFileChooser.cs
@@ -38,7 +38,6 @@ namespace LongoMatch.Gui.Component
                        this.Build ();
 
                        nameentry.NoShowAll = true;
-                       clearbutton.NoShowAll = true;
 
                        // The name entry is only visible when not empty
                        nameentry.Visible = !String.IsNullOrEmpty (name);
@@ -147,7 +146,7 @@ namespace LongoMatch.Gui.Component
                                fileentry.TooltipText = fileentry.Text;
                        }
 
-                       clearbutton.Visible = clear_visible;
+                       clearbutton.Sensitive = clear_visible;
                }
 
                void HandleClearClicked (object sender, EventArgs e)