Show menu on right-click press.

Fixes launchpad bug #356982.


=== modified file 'src/task-list.c'
--- src/task-list.c	2009-03-04 16:14:38 +0000
+++ src/task-list.c	2009-04-07 15:05:05 +0000
@@ -173,9 +173,9 @@
 }
 
 static gboolean
-on_button_clicked (GtkWidget      *button, 
-                   GdkEventButton *event,
-                   WnckWindow     *window)
+on_button_released (GtkWidget      *button,
+                    GdkEventButton *event,
+                    WnckWindow     *window)
 {
   g_return_val_if_fail (WNCK_IS_WINDOW (window), FALSE);
 
@@ -196,10 +196,21 @@
     
     return TRUE;
   }
-  else if (event->button == 3)
+
+  return FALSE;
+}
+
+static gboolean
+on_button_pressed (GtkWidget      *button,
+                   GdkEventButton *event,
+                   WnckWindow     *window)
+{
+  g_return_val_if_fail (WNCK_IS_WINDOW (window), FALSE);
+
+  if (event->button == 3)
   {
     GtkWidget *menu = wnck_action_menu_new (window);
-    gtk_menu_popup (GTK_MENU (menu), NULL, NULL, NULL, NULL, 
+    gtk_menu_popup (GTK_MENU (menu), NULL, NULL, NULL, NULL,
                     event->button, event->time);
     return TRUE;
   }
@@ -434,7 +445,9 @@
   gtk_box_pack_start (GTK_BOX (list), button, FALSE, FALSE, 0);
   
   g_signal_connect (button, "button-release-event",
-                    G_CALLBACK (on_button_clicked), window);
+                    G_CALLBACK (on_button_released), window);
+  g_signal_connect (button, "button-press-event",
+                    G_CALLBACK (on_button_pressed), window);
   g_signal_connect (button, "leave-notify-event",
                     G_CALLBACK (on_leave_notify_event), list);
   g_signal_connect (button, "query-tooltip",