[shotwell] Fix another merge issue

[Jens Georg <jensgeorg src gnome org>]

commit caa27aa336f77a9e969bd7972ccec609b1bbf00f
Author: Jens Georg <mail jensge org>
Date:   Wed Dec 20 23:30:56 2017 +0100

    Fix another merge issue

 ui/manifest_widget.ui |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/ui/manifest_widget.ui b/ui/manifest_widget.ui
index edbeb59..afcf173 100644
--- a/ui/manifest_widget.ui
+++ b/ui/manifest_widget.ui
@@ -2,7 +2,7 @@
 <!-- Generated with glade 3.20.0 -->
 <interface domain="shotwell">
   <requires lib="gtk+" version="3.18"/>
-  <template class="ManifestWidgetMediator" parent="GtkBox">
+  <template class="PluginsManifestWidgetMediator" parent="GtkBox">
     <property name="visible">True</property>
     <property name="can_focus">False</property>
     <property name="orientation">vertical</property>