[evince] ev-view: Add Shift+Space keybinding to go back in presentation mode

[Germán Poo-Caamaño <gpoo src gnome org>]

commit 282b2f849ad34a470aadb551271d4f0575193fef
Author: Jaakko Hannikainen <jgke jgke fi>
Date:   Wed Dec 2 10:35:31 2015 -0800

    ev-view: Add Shift+Space keybinding to go back in presentation mode
    
    Fixes https://bugzilla.gnome.org/show_bug.cgi?id=758162

 libview/ev-view-presentation.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/libview/ev-view-presentation.c b/libview/ev-view-presentation.c
index ea9aee0..4a79eba 100644
--- a/libview/ev-view-presentation.c
+++ b/libview/ev-view-presentation.c
@@ -1561,6 +1561,9 @@ ev_view_presentation_class_init (EvViewPresentationClass *klass)
        gtk_binding_entry_add_signal (binding_set, GDK_KEY_space, 0,
                                      "change_page", 1,
                                      GTK_TYPE_SCROLL_TYPE, GTK_SCROLL_PAGE_FORWARD);
+       gtk_binding_entry_add_signal (binding_set, GDK_KEY_space, GDK_SHIFT_MASK,
+                                     "change_page", 1,
+                                     GTK_TYPE_SCROLL_TYPE, GTK_SCROLL_PAGE_BACKWARD);
        gtk_binding_entry_add_signal (binding_set, GDK_KEY_BackSpace, 0,
                                      "change_page", 1,
                                      GTK_TYPE_SCROLL_TYPE, GTK_SCROLL_PAGE_BACKWARD);