[chronojump] Better string for export session message

[Xavier de Blas <xaviblas src gnome org>]

commit 8a898a7005c108576521afe713527f740b49df02
Author: Xavier de Blas <xaviblas gmail com>
Date:   Tue Nov 14 12:26:19 2017 +0100

    Better string for export session message

 src/gui/chronojump.cs |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)
---
diff --git a/src/gui/chronojump.cs b/src/gui/chronojump.cs
index 061b799..e342e8d 100644
--- a/src/gui/chronojump.cs
+++ b/src/gui/chronojump.cs
@@ -2471,7 +2471,12 @@ public partial class ChronoJumpWindow
        }
 
        private void on_export_session_activate(object o, EventArgs args) {
-               ConfirmWindow confirmWin = ConfirmWindow.Show(Catalog.GetString("Only persons, jumps and 
races will be exported."), "", "");
+               ConfirmWindow confirmWin = ConfirmWindow.Show(
+                               Catalog.GetString("Export will include this data:") +
+                               "\n\n" + Catalog.GetString("Persons") +
+                               "\n" + Catalog.GetString("Jumps") +
+                               "\n" + Catalog.GetString("Races") + "\n"
+                               , "", "");
                confirmWin.Button_accept.Clicked += new EventHandler(on_export_session_accepted);
        }