[gnome-software/gnome-3-20] Do not introduce a string addition in the stable branch

[Richard Hughes <rhughes src gnome org>]

commit a642132716ab2aa0dc8f02fbc33f2a3b585bca60
Author: Richard Hughes <richard hughsie com>
Date:   Tue Mar 29 19:49:07 2016 +0100

    Do not introduce a string addition in the stable branch
    
    Just use the existing string for now, 'Install' is fine in this context.

 src/gs-shell-details.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/gs-shell-details.c b/src/gs-shell-details.c
index 727d480..1d59993 100644
--- a/src/gs-shell-details.c
+++ b/src/gs-shell-details.c
@@ -229,7 +229,7 @@ gs_shell_details_switch_to (GsPage *page, gboolean scroll_up)
                } else {
                        /* TRANSLATORS: button text in the header when an application
                         * can be live-updated */
-                       gtk_button_set_label (GTK_BUTTON (self->button_install), _("_Update"));
+                       gtk_button_set_label (GTK_BUTTON (self->button_install), _("_Install"));
                        gtk_style_context_remove_class (sc, "suggested-action");
                }
                break;