[shotwell] saved search: Fix working with Gtk 3.18

[Jens Georg <jensgeorg src gnome org>]

commit 33582fba9ccbc7e7e5245f5a56aa948936fef4b8
Author: Jens Georg <mail jensge org>
Date:   Mon Mar 26 00:29:14 2018 +0200

    saved search: Fix working with Gtk 3.18
    
    Looks like Glade's verifier did not find this.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=794673

 ui/saved_search_dialog.ui |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)
---
diff --git a/ui/saved_search_dialog.ui b/ui/saved_search_dialog.ui
index 129bf26..825b750 100644
--- a/ui/saved_search_dialog.ui
+++ b/ui/saved_search_dialog.ui
@@ -222,7 +222,6 @@
                 <property name="hscrollbar_policy">never</property>
                 <property name="shadow_type">in</property>
                 <property name="min_content_height">176</property>
-                <property name="propagate_natural_width">True</property>
                 <child>
                   <object class="GtkViewport">
                     <property name="visible">True</property>