[shotwell] Enhance spacing without headerbars

[Jens Georg <jensgeorg src gnome org>]

commit 908b0333d8f6f2bdd1520e6d6fdecb237da94750
Author: Jens Georg <mail jensge org>
Date:   Thu Dec 28 08:50:17 2017 +0100

    Enhance spacing without headerbars

 src/publishing/PublishingUI.vala |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)
---
diff --git a/src/publishing/PublishingUI.vala b/src/publishing/PublishingUI.vala
index f385ec6..3d4f609 100644
--- a/src/publishing/PublishingUI.vala
+++ b/src/publishing/PublishingUI.vala
@@ -163,8 +163,11 @@ public class PublishingDialog : Gtk.Dialog {
 
         bool use_header = Resources.use_header_bar() == 1;
         Object(use_header_bar: Resources.use_header_bar());
-        if (use_header)
+        if (use_header) {
             ((Gtk.HeaderBar) get_header_bar()).set_show_close_button(false);
+        } else {
+            get_content_area().set_spacing(6);
+        }
 
         resizable = false;
         modal = true;