[dia] Added hotkeys for exit dialog buttons.

[Zander <zbrown src gnome org>]

commit dda471808eba97bcb0d3cbc79e78e15134cde4b6
Author: Martin van Zijl <martin vanzijl gmail com>
Date:   Wed Feb 15 07:29:37 2017 +1300

    Added hotkeys for exit dialog buttons.

 app/exit_dialog.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/app/exit_dialog.c b/app/exit_dialog.c
index e4c5decc..859a7cd8 100644
--- a/app/exit_dialog.c
+++ b/app/exit_dialog.c
@@ -74,11 +74,11 @@ exit_dialog_make (GtkWindow * parent_window,
 {
     GtkWidget * dialog = gtk_dialog_new_with_buttons (title, parent_window,
                                                       GTK_DIALOG_MODAL,
-                                                      _("Do Not Exit"),
+                                                      _("_Do Not Exit"),
                                                       EXIT_DIALOG_EXIT_CANCEL,
-                                                      _("Exit Without Save"),
+                                                      _("_Exit Without Save"),
                                                       EXIT_DIALOG_EXIT_NO_SAVE,
-                                                      _("Save Selected"),
+                                                      _("_Save Selected"),
                                                       EXIT_DIALOG_EXIT_SAVE_SELECTED,
                                                       NULL);