[empathy] Add a tooltip to the “Unlink” button

[Philip Withnall <pwithnall src gnome org>]

commit 60d158ac379d725e0ecd91c74ea7de7a65b212bc
Author: Philip Withnall <philip withnall collabora co uk>
Date:   Wed Sep 1 11:12:09 2010 +0100

    Add a tooltip to the â??Unlinkâ?? button
    
    Closes: bgo#628376

 libempathy-gtk/empathy-linking-dialog.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/libempathy-gtk/empathy-linking-dialog.c b/libempathy-gtk/empathy-linking-dialog.c
index d1df295..cb6461a 100644
--- a/libempathy-gtk/empathy-linking-dialog.c
+++ b/libempathy-gtk/empathy-linking-dialog.c
@@ -118,6 +118,8 @@ empathy_linking_dialog_init (EmpathyLinkingDialog *self)
   /* Unlink button */
   button = gtk_button_new_with_mnemonic (
       C_("Unlink individual (button)", "_Unlinkâ?¦"));
+  gtk_widget_set_tooltip_text (button, _("Completely split the displayed "
+      "meta-contact into the contacts it contains."));
   gtk_dialog_add_action_widget (dialog, button, RESPONSE_UNLINK);
   gtk_widget_show (button);